55897722 has 32 divisors (see below), whose sum is σ = 126567360. Its totient is φ = 18280080.

The previous prime is 55897693. The next prime is 55897729. The reversal of 55897722 is 22779855.

It is a happy number.

55897722 is a `hidden beast` number, since 558 + 9 + 77 + 22 = 666.

It is not an unprimeable number, because it can be changed into a prime (55897729) 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, 6904 + ... + 12627.

It is an arithmetic number, because the mean of its divisors is an integer number (3955230).

Almost surely, 2^55897722 is an apocalyptic number.

55897722 is an abundant number, since it is smaller than the sum of its proper divisors (70669638).

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

55897722 is a wasteful number, since it uses less digits than its factorization.

55897722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19595 (or 19589 counting only the distinct ones).

The product of its digits is 352800, while the sum is 45.

The square root of 55897722 is about 7476.4779140983. The cubic root of 55897722 is about 382.3531770209.

The spelling of 55897722 in words is "fifty-five million, eight hundred ninety-seven thousand, seven hundred twenty-two".