55421877 has 16 divisors (see below), whose sum is σ = 84560000. Its totient is φ = 31629312.

The previous prime is 55421857. The next prime is 55421903. The reversal of 55421877 is 77812455.

It is not a de Polignac number, because 55421877 - 2⁷ = 55421749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55421837) 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, 25173 + ... + 27285.

It is an arithmetic number, because the mean of its divisors is an integer number (5285000).

Almost surely, 2^55421877 is an apocalyptic number.

It is an amenable number.

55421877 is a deficient number, since it is larger than the sum of its proper divisors (29138123).

55421877 is a wasteful number, since it uses less digits than its factorization.

55421877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3372.

The product of its digits is 78400, while the sum is 39.

The square root of 55421877 is about 7444.5870939898. The cubic root of 55421877 is about 381.2651208909.

The spelling of 55421877 in words is "fifty-five million, four hundred twenty-one thousand, eight hundred seventy-seven".