56781552 has 40 divisors (see below), whose sum is σ = 147111120. Its totient is φ = 18872320.

The previous prime is 56781551. The next prime is 56781563. The reversal of 56781552 is 25518765.

56781552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×56781552³ (a number of 24 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 56781552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56781551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17152 + ... + 20192.

It is an arithmetic number, because the mean of its divisors is an integer number (3677778).

Almost surely, 2^56781552 is an apocalyptic number.

It is an amenable number.

56781552 is an abundant number, since it is smaller than the sum of its proper divisors (90329568).

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

56781552 is a wasteful number, since it uses less digits than its factorization.

56781552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3441 (or 3435 counting only the distinct ones).

The product of its digits is 84000, while the sum is 39.

The square root of 56781552 is about 7535.3534754516. The cubic root of 56781552 is about 384.3578478433.

The spelling of 56781552 in words is "fifty-six million, seven hundred eighty-one thousand, five hundred fifty-two".