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331310421 = 32138931817
BaseRepresentation
bin10011101111110…
…110010101010101
3212002102022110100
4103233312111111
51134303413141
652513044313
711132043411
oct2357662525
9762368410
10331310421
1116001a472
1292b56699
1353841390
1432003d41
151e1460b6
hex13bf6555

331310421 has 24 divisors (see below), whose sum is σ = 521178840. Its totient is φ = 201586176.

The previous prime is 331310417. The next prime is 331310449. The reversal of 331310421 is 124013133.

331310421 is a `hidden beast` number, since 331 + 310 + 4 + 21 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 22043025 + 309267396 = 4695^2 + 17586^2 .

It is not a de Polignac number, because 331310421 - 22 = 331310417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 331310394 and 331310403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331310411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5496 + ... + 26321.

It is an arithmetic number, because the mean of its divisors is an integer number (21715785).

Almost surely, 2331310421 is an apocalyptic number.

It is an amenable number.

331310421 is a deficient number, since it is larger than the sum of its proper divisors (189868419).

331310421 is a wasteful number, since it uses less digits than its factorization.

331310421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31925 (or 31922 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 331310421 is about 18201.9345400427. The cubic root of 331310421 is about 691.9558183170.

Adding to 331310421 its reverse (124013133), we get a palindrome (455323554).

The spelling of 331310421 in words is "three hundred thirty-one million, three hundred ten thousand, four hundred twenty-one".

Divisors: 1 3 9 13 39 89 117 267 801 1157 3471 10413 31817 95451 286353 413621 1240863 2831713 3722589 8495139 25485417 36812269 110436807 331310421