56403431 has 8 divisors (see below), whose sum is σ = 65832960. Its totient is φ = 47316888.

The previous prime is 56403427. The next prime is 56403449. The reversal of 56403431 is 13430465.

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

It is a cyclic number.

It is not a de Polignac number, because 56403431 - 2² = 56403427 is a prime.

It is a super-2 number, since 2×56403431² = 6362694057143522, 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 56403431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56403421) 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, 85391 + ... + 86048.

It is an arithmetic number, because the mean of its divisors is an integer number (8229120).

Almost surely, 2^56403431 is an apocalyptic number.

56403431 is a deficient number, since it is larger than the sum of its proper divisors (9429529).

56403431 is a wasteful number, since it uses less digits than its factorization.

56403431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171493.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 56403431 is about 7510.2217676977. The cubic root of 56403431 is about 383.5027721435.

Adding to 56403431 its reverse (13430465), we get a palindrome (69833896).

The spelling of 56403431 in words is "fifty-six million, four hundred three thousand, four hundred thirty-one".