55312971 has 16 divisors (see below), whose sum is σ = 88723200. Its totient is φ = 29943648.

The previous prime is 55312967. The next prime is 55312979. The reversal of 55312971 is 17921355.

It is not a de Polignac number, because 55312971 - 2² = 55312967 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55312979) 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, 68916 + ... + 69713.

It is an arithmetic number, because the mean of its divisors is an integer number (5545200).

Almost surely, 2^55312971 is an apocalyptic number.

55312971 is a deficient number, since it is larger than the sum of its proper divisors (33410229).

55312971 is a wasteful number, since it uses less digits than its factorization.

55312971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138658.

The product of its digits is 9450, while the sum is 33.

The square root of 55312971 is about 7437.2690552380. The cubic root of 55312971 is about 381.0152238666.

The spelling of 55312971 in words is "fifty-five million, three hundred twelve thousand, nine hundred seventy-one".