55157100 has 72 divisors (see below), whose sum is σ = 162645840. Its totient is φ = 14426880.

The previous prime is 55157099. The next prime is 55157107. The reversal of 55157100 is 175155.

It is not an unprimeable number, because it can be changed into a prime (55157107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14166 + ... + 17634.

It is an arithmetic number, because the mean of its divisors is an integer number (2258970).

Almost surely, 2^55157100 is an apocalyptic number.

55157100 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 55157100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81322920).

55157100 is an abundant number, since it is smaller than the sum of its proper divisors (107488740).

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

55157100 is a wasteful number, since it uses less digits than its factorization.

55157100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3539 (or 3532 counting only the distinct ones).

The product of its (nonzero) digits is 875, while the sum is 24.

The square root of 55157100 is about 7426.7826142954. The cubic root of 55157100 is about 380.6569890420.

The spelling of 55157100 in words is "fifty-five million, one hundred fifty-seven thousand, one hundred".