55871761 has 32 divisors (see below), whose sum is σ = 68428800. Its totient is φ = 45017280.

The previous prime is 55871743. The next prime is 55871771. The reversal of 55871761 is 16717855.

It is not a de Polignac number, because 55871761 - 2⁵ = 55871729 is a prime.

It is a super-2 number, since 2×55871761² = 6243307354482242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55871701) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 283515 + ... + 283711.

It is an arithmetic number, because the mean of its divisors is an integer number (2138400).

Almost surely, 2^55871761 is an apocalyptic number.

It is an amenable number.

55871761 is a deficient number, since it is larger than the sum of its proper divisors (12557039).

55871761 is a wasteful number, since it uses less digits than its factorization.

55871761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309.

The product of its digits is 58800, while the sum is 40.

The square root of 55871761 is about 7474.7415339930. The cubic root of 55871761 is about 382.2939747995.

The spelling of 55871761 in words is "fifty-five million, eight hundred seventy-one thousand, seven hundred sixty-one".