55620204 has 12 divisors (see below), whose sum is σ = 129780504. Its totient is φ = 18540064.

The previous prime is 55620203. The next prime is 55620263. The reversal of 55620204 is 40202655.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (55620203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2317497 + ... + 2317520.

It is an arithmetic number, because the mean of its divisors is an integer number (10815042).

Almost surely, 2^55620204 is an apocalyptic number.

It is an amenable number.

55620204 is an abundant number, since it is smaller than the sum of its proper divisors (74160300).

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

55620204 is a wasteful number, since it uses less digits than its factorization.

55620204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4635024 (or 4635022 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 55620204 is about 7457.8954135869. The cubic root of 55620204 is about 381.7193648008.

Adding to 55620204 its reverse (40202655), we get a palindrome (95822859).

The spelling of 55620204 in words is "fifty-five million, six hundred twenty thousand, two hundred four".