56951220 has 48 divisors (see below), whose sum is σ = 166400640. Its totient is φ = 14526336.

The previous prime is 56951201. The next prime is 56951233. The reversal of 56951220 is 2215965.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19255 + ... + 22014.

It is an arithmetic number, because the mean of its divisors is an integer number (3466680).

Almost surely, 2^56951220 is an apocalyptic number.

It is an amenable number.

56951220 is an abundant number, since it is smaller than the sum of its proper divisors (109449420).

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

56951220 is a wasteful number, since it uses less digits than its factorization.

56951220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41304 (or 41302 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 56951220 is about 7546.6032093916. The cubic root of 56951220 is about 384.7402982370.

The spelling of 56951220 in words is "fifty-six million, nine hundred fifty-one thousand, two hundred twenty".