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521344423 = 17117126189
BaseRepresentation
bin11111000100110…
…001010110100111
31100100000001002201
4133010301112213
52031431010143
6123422115331
715630232405
oct3704612647
91310001081
10521344423
11248315866
1212671bb47
1384019432
144d350475
1530b8264d
hex1f1315a7

521344423 has 8 divisors (see below), whose sum is σ = 552504240. Its totient is φ = 490239360.

The previous prime is 521344403. The next prime is 521344429. The reversal of 521344423 is 324443125.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-521344423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 521344391 and 521344400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521344429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6813 + ... + 33001.

It is an arithmetic number, because the mean of its divisors is an integer number (69063030).

Almost surely, 2521344423 is an apocalyptic number.

521344423 is a deficient number, since it is larger than the sum of its proper divisors (31159817).

521344423 is a wasteful number, since it uses less digits than its factorization.

521344423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27377.

The product of its digits is 11520, while the sum is 28.

The square root of 521344423 is about 22832.9678973190. The cubic root of 521344423 is about 804.8375753468.

Adding to 521344423 its reverse (324443125), we get a palindrome (845787548).

The spelling of 521344423 in words is "five hundred twenty-one million, three hundred forty-four thousand, four hundred twenty-three".

Divisors: 1 17 1171 19907 26189 445213 30667319 521344423