56404031 has 8 divisors (see below), whose sum is σ = 57829680. Its totient is φ = 54991872.

The previous prime is 56404013. The next prime is 56404081. The reversal of 56404031 is 13040465.

It is a happy number.

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 56404031 - 2¹⁸ = 56141887 is a prime.

It is a super-3 number, since 3×56404031³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56403988 and 56404006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56404001) 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, 5375 + ... + 11903.

It is an arithmetic number, because the mean of its divisors is an integer number (7228710).

Almost surely, 2^56404031 is an apocalyptic number.

56404031 is a deficient number, since it is larger than the sum of its proper divisors (1425649).

56404031 is a wasteful number, since it uses less digits than its factorization.

56404031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6745.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 56404031 is about 7510.2617131495. The cubic root of 56404031 is about 383.5041319949.

Adding to 56404031 its reverse (13040465), we get a palindrome (69444496).

The spelling of 56404031 in words is "fifty-six million, four hundred four thousand, thirty-one".