56040621 has 32 divisors (see below), whose sum is σ = 92725248. Its totient is φ = 29315520.

The previous prime is 56040613. The next prime is 56040623. The reversal of 56040621 is 12604065.

It is not a de Polignac number, because 56040621 - 2³ = 56040613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56040591 and 56040600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56040623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34980 + ... + 36546.

It is an arithmetic number, because the mean of its divisors is an integer number (2897664).

Almost surely, 2^56040621 is an apocalyptic number.

It is an amenable number.

56040621 is a deficient number, since it is larger than the sum of its proper divisors (36684627).

56040621 is a wasteful number, since it uses less digits than its factorization.

56040621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1721.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 56040621 is about 7486.0283862673. The cubic root of 56040621 is about 382.6787203600.

Adding to 56040621 its reverse (12604065), we get a palindrome (68644686).

It can be divided in two parts, 560406 and 21, that multiplied together give a triangular number (11768526 = T₄₈₅₁).

The spelling of 56040621 in words is "fifty-six million, forty thousand, six hundred twenty-one".