55957881 has 8 divisors (see below), whose sum is σ = 85269184. Its totient is φ = 31975920.

The previous prime is 55957861. The next prime is 55957903. The reversal of 55957881 is 18875955.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55957881 - 2⁶ = 55957817 is a prime.

It is a super-2 number, since 2×55957881² = 6262568892020322, which contains 22 as substring.

It is the 7481-st Hogben number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55957881.

It is not an unprimeable number, because it can be changed into a prime (55957861) by changing a digit.

It is a nontrivial repunit in base 7480.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1332310 + ... + 1332351.

It is an arithmetic number, because the mean of its divisors is an integer number (10658648).

Almost surely, 2^55957881 is an apocalyptic number.

It is an amenable number.

55957881 is a deficient number, since it is larger than the sum of its proper divisors (29311303).

55957881 is a wasteful number, since it uses less digits than its factorization.

55957881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2664671.

The product of its digits is 504000, while the sum is 48.

The square root of 55957881 is about 7480.5000501303. The cubic root of 55957881 is about 382.4902949394.

The spelling of 55957881 in words is "fifty-five million, nine hundred fifty-seven thousand, eight hundred eighty-one".