56551904 has 48 divisors (see below), whose sum is σ = 119750400. Its totient is φ = 26204544.

The previous prime is 56551903. The next prime is 56551909. The reversal of 56551904 is 40915565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56551903) 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, 27587 + ... + 29565.

It is an arithmetic number, because the mean of its divisors is an integer number (2494800).

Almost surely, 2^56551904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56551904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59875200).

56551904 is an abundant number, since it is smaller than the sum of its proper divisors (63198496).

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

56551904 is a wasteful number, since it uses less digits than its factorization.

56551904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2055 (or 2047 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 56551904 is about 7520.0999993351. The cubic root of 56551904 is about 383.8389805229.

It can be divided in two parts, 5655 and 1904, that multiplied together give a triangular number (10767120 = T₄₆₄₀).

The spelling of 56551904 in words is "fifty-six million, five hundred fifty-one thousand, nine hundred four".