56551404 has 48 divisors (see below), whose sum is σ = 162407168. Its totient is φ = 14914368.

The previous prime is 56551403. The next prime is 56551433. The reversal of 56551404 is 40415565.

It is a super-2 number, since 2×56551404² = 6396122588742432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56551403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24802 + ... + 26985.

Almost surely, 2^56551404 is an apocalyptic number.

It is an amenable number.

56551404 is an abundant number, since it is smaller than the sum of its proper divisors (105855764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56551404 is a wasteful number, since it uses less digits than its factorization.

56551404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51814 (or 51812 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 56551404 is about 7520.0667550229. The cubic root of 56551404 is about 383.8378492904.

Adding to 56551404 its reverse (40415565), we get a palindrome (96966969).

The spelling of 56551404 in words is "fifty-six million, five hundred fifty-one thousand, four hundred four".