55020537 has 24 divisors (see below), whose sum is σ = 93370368. Its totient is φ = 30780000.

The previous prime is 55020529. The next prime is 55020547. The reversal of 55020537 is 73502055.

It is not a de Polignac number, because 55020537 - 2³ = 55020529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55020537.

It is not an unprimeable number, because it can be changed into a prime (55020547) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20089 + ... + 22662.

It is an arithmetic number, because the mean of its divisors is an integer number (3890432).

Almost surely, 2^55020537 is an apocalyptic number.

It is an amenable number.

55020537 is a deficient number, since it is larger than the sum of its proper divisors (38349831).

55020537 is a wasteful number, since it uses less digits than its factorization.

55020537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42781 (or 42778 counting only the distinct ones).

The product of its (nonzero) digits is 5250, while the sum is 27.

The square root of 55020537 is about 7417.5829621245. The cubic root of 55020537 is about 380.3425742675.

The spelling of 55020537 in words is "fifty-five million, twenty thousand, five hundred thirty-seven".