423572531 has 4 divisors (see below), whose sum is σ = 441988752. Its totient is φ = 405156312.

The previous prime is 423572509. The next prime is 423572573. The reversal of 423572531 is 135275324.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423572531 is a prime.

It is a super-2 number, since 2×423572531² = 358827378035491922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423572431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9208076 + ... + 9208121.

It is an arithmetic number, because the mean of its divisors is an integer number (110497188).

Almost surely, 2^423572531 is an apocalyptic number.

423572531 is a deficient number, since it is larger than the sum of its proper divisors (18416221).

423572531 is a wasteful number, since it uses less digits than its factorization.

423572531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18416220.

The product of its digits is 25200, while the sum is 32.

The square root of 423572531 is about 20580.8777995498. The cubic root of 423572531 is about 751.0045980724.

The spelling of 423572531 in words is "four hundred twenty-three million, five hundred seventy-two thousand, five hundred thirty-one".