55136920 has 32 divisors (see below), whose sum is σ = 124419600. Its totient is φ = 21990528.

The previous prime is 55136891. The next prime is 55136927. The reversal of 55136920 is 2963155.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55136927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13342 + ... + 16978.

Almost surely, 2^55136920 is an apocalyptic number.

It is an amenable number.

55136920 is an abundant number, since it is smaller than the sum of its proper divisors (69282680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55136920 is a wasteful number, since it uses less digits than its factorization.

55136920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4027 (or 4023 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 55136920 is about 7425.4238936239. The cubic root of 55136920 is about 380.6105604767.

The spelling of 55136920 in words is "fifty-five million, one hundred thirty-six thousand, nine hundred twenty".