523315431 has 32 divisors (see below), whose sum is σ = 801662400. Its totient is φ = 337167360.

The previous prime is 523315421. The next prime is 523315439. The reversal of 523315431 is 134513325.

It is not a de Polignac number, because 523315431 - 2⁵ = 523315399 is a prime.

It is a super-2 number, since 2×523315431² = 547718080645431522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 523315395 and 523315404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523315439) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 118495 + ... + 122831.

It is an arithmetic number, because the mean of its divisors is an integer number (25051950).

Almost surely, 2^523315431 is an apocalyptic number.

523315431 is a deficient number, since it is larger than the sum of its proper divisors (278346969).

523315431 is a wasteful number, since it uses less digits than its factorization.

523315431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4496 (or 4490 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 523315431 is about 22876.0886298336. The cubic root of 523315431 is about 805.8505629850.

Adding to 523315431 its reverse (134513325), we get a palindrome (657828756).

The spelling of 523315431 in words is "five hundred twenty-three million, three hundred fifteen thousand, four hundred thirty-one".