55140900 has 72 divisors (see below), whose sum is σ = 163468704. Its totient is φ = 14342400.

The previous prime is 55140887. The next prime is 55140931. The reversal of 55140900 is 904155.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10059 + ... + 14541.

Almost surely, 2^55140900 is an apocalyptic number.

55140900 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55140900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81734352).

55140900 is an abundant number, since it is smaller than the sum of its proper divisors (108327804).

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

55140900 is a wasteful number, since it uses less digits than its factorization.

55140900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4541 (or 4534 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 55140900 is about 7425.6918869557. The cubic root of 55140900 is about 380.6197182461.

The spelling of 55140900 in words is "fifty-five million, one hundred forty thousand, nine hundred".