56561370 has 32 divisors (see below), whose sum is σ = 141651072. Its totient is φ = 14427072.

The previous prime is 56561357. The next prime is 56561371. The reversal of 56561370 is 7316565.

It is not an unprimeable number, because it can be changed into a prime (56561371) 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, 40297 + ... + 41676.

It is an arithmetic number, because the mean of its divisors is an integer number (4426596).

Almost surely, 2^56561370 is an apocalyptic number.

56561370 is an abundant number, since it is smaller than the sum of its proper divisors (85089702).

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

56561370 is a wasteful number, since it uses less digits than its factorization.

56561370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82006.

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 56561370 is about 7520.7293529285. The cubic root of 56561370 is about 383.8603957587.

The spelling of 56561370 in words is "fifty-six million, five hundred sixty-one thousand, three hundred seventy".