55020072 has 32 divisors (see below), whose sum is σ = 137872800. Its totient is φ = 18297024.

The previous prime is 55020061. The next prime is 55020089. The reversal of 55020072 is 27002055.

It is an unprimeable number.

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, 8754 + ... + 13662.

It is an arithmetic number, because the mean of its divisors is an integer number (4308525).

Almost surely, 2^55020072 is an apocalyptic number.

It is an amenable number.

55020072 is an abundant number, since it is smaller than the sum of its proper divisors (82852728).

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

55020072 is a wasteful number, since it uses less digits than its factorization.

55020072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5385 (or 5381 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 21.

The square root of 55020072 is about 7417.5516176162. The cubic root of 55020072 is about 380.3415027900.

The spelling of 55020072 in words is "fifty-five million, twenty thousand, seventy-two".