55012020 has 48 divisors (see below), whose sum is σ = 176039808. Its totient is φ = 12574080.

The previous prime is 55012003. The next prime is 55012031. The reversal of 55012020 is 2021055.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65071 + ... + 65910.

It is an arithmetic number, because the mean of its divisors is an integer number (3667496).

Almost surely, 2^55012020 is an apocalyptic number.

It is an amenable number.

55012020 is an abundant number, since it is smaller than the sum of its proper divisors (121027788).

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

55012020 is a wasteful number, since it uses less digits than its factorization.

55012020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131000 (or 130998 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 55012020 is about 7417.0088310585. The cubic root of 55012020 is about 380.3229479907.

Adding to 55012020 its reverse (2021055), we get a palindrome (57033075).

The spelling of 55012020 in words is "fifty-five million, twelve thousand, twenty".