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247431 = 3671231
BaseRepresentation
bin111100011010000111
3110120102010
4330122013
530404211
65145303
72050242
oct743207
9416363
10247431
11159998
12bb233
1388812
1466259
154d4a6
hex3c687

247431 has 8 divisors (see below), whose sum is σ = 335104. Its totient is φ = 162360.

The previous prime is 247421. The next prime is 247433. The reversal of 247431 is 134742.

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

It is not a de Polignac number, because 247431 - 29 = 246919 is a prime.

It is a super-2 number, since 2×2474312 = 122444199522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 247398 and 247407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247433) 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, 415 + ... + 816.

It is an arithmetic number, because the mean of its divisors is an integer number (41888).

2247431 is an apocalyptic number.

247431 is a deficient number, since it is larger than the sum of its proper divisors (87673).

247431 is a wasteful number, since it uses less digits than its factorization.

247431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301.

The product of its digits is 672, while the sum is 21.

The square root of 247431 is about 497.4243661101. The cubic root of 247431 is about 62.7795266406.

The spelling of 247431 in words is "two hundred forty-seven thousand, four hundred thirty-one".

Divisors: 1 3 67 201 1231 3693 82477 247431