55201980 has 48 divisors (see below), whose sum is σ = 155159424. Its totient is φ = 14664000.

The previous prime is 55201963. The next prime is 55201997. The reversal of 55201980 is 8910255.

It is an interprime number because it is at equal distance from previous prime (55201963) and next prime (55201997).

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 15355 + ... + 18605.

It is an arithmetic number, because the mean of its divisors is an integer number (3232488).

Almost surely, 2^55201980 is an apocalyptic number.

It is an amenable number.

55201980 is an abundant number, since it is smaller than the sum of its proper divisors (99957444).

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

55201980 is a wasteful number, since it uses less digits than its factorization.

55201980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3546 (or 3544 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 55201980 is about 7429.8034967286. The cubic root of 55201980 is about 380.7602048515.

The spelling of 55201980 in words is "fifty-five million, two hundred one thousand, nine hundred eighty".