55981995 has 16 divisors (see below), whose sum is σ = 89664000. Its totient is φ = 29826144.

The previous prime is 55981967. The next prime is 55982011. The reversal of 55981995 is 59918955.

It is a happy number.

It is not a de Polignac number, because 55981995 - 2⁵ = 55981963 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27006 + ... + 29004.

It is an arithmetic number, because the mean of its divisors is an integer number (5604000).

Almost surely, 2^55981995 is an apocalyptic number.

55981995 is a deficient number, since it is larger than the sum of its proper divisors (33682005).

55981995 is a wasteful number, since it uses less digits than its factorization.

55981995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3874.

The product of its digits is 729000, while the sum is 51.

The square root of 55981995 is about 7482.1116671699. Note that the first 3 decimals coincide. The cubic root of 55981995 is about 382.5452293903.

The spelling of 55981995 in words is "fifty-five million, nine hundred eighty-one thousand, nine hundred ninety-five".