431545681 has 8 divisors (see below), whose sum is σ = 503688960. Its totient is φ = 362025888.

The previous prime is 431545661. The next prime is 431545703. The reversal of 431545681 is 186545134.

It is a happy number.

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

It is not a de Polignac number, because 431545681 - 2⁵ = 431545649 is a prime.

It is a super-2 number, since 2×431545681² = 372463349579507522, which contains 22 as substring.

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 431545681.

It is not an unprimeable number, because it can be changed into a prime (431545661) 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, 655516 + ... + 656173.

It is an arithmetic number, because the mean of its divisors is an integer number (62961120).

Almost surely, 2^431545681 is an apocalyptic number.

It is an amenable number.

431545681 is a deficient number, since it is larger than the sum of its proper divisors (72143279).

431545681 is a wasteful number, since it uses less digits than its factorization.

431545681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311743.

The product of its digits is 57600, while the sum is 37.

The square root of 431545681 is about 20773.6775993082. The cubic root of 431545681 is about 755.6875341737.

The spelling of 431545681 in words is "four hundred thirty-one million, five hundred forty-five thousand, six hundred eighty-one".