431772257 has 4 divisors (see below), whose sum is σ = 493454016. Its totient is φ = 370090500.

The previous prime is 431772241. The next prime is 431772301. The reversal of 431772257 is 752277134.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 431772257 - 2⁴ = 431772241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 431772257.

It is not an unprimeable number, because it can be changed into a prime (431772227) 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, 30840869 + ... + 30840882.

It is an arithmetic number, because the mean of its divisors is an integer number (123363504).

Almost surely, 2^431772257 is an apocalyptic number.

It is an amenable number.

431772257 is a deficient number, since it is larger than the sum of its proper divisors (61681759).

431772257 is an equidigital number, since it uses as much as digits as its factorization.

431772257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61681758.

The product of its digits is 82320, while the sum is 38.

The square root of 431772257 is about 20779.1303234760. The cubic root of 431772257 is about 755.8197648270.

The spelling of 431772257 in words is "four hundred thirty-one million, seven hundred seventy-two thousand, two hundred fifty-seven".