204157100 has 144 divisors (see below), whose sum is σ = 534340800. Its totient is φ = 66232320.

The previous prime is 204157091. The next prime is 204157117. The reversal of 204157100 is 1751402.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1806644 + ... + 1806756.

It is an arithmetic number, because the mean of its divisors is an integer number (3710700).

Almost surely, 2^204157100 is an apocalyptic number.

204157100 is a gapful number since it is divisible by the number (20) 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 204157100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267170400).

204157100 is an abundant number, since it is smaller than the sum of its proper divisors (330183700).

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

204157100 is a wasteful number, since it uses less digits than its factorization.

204157100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 204157100 is about 14288.3553987154. The cubic root of 204157100 is about 588.8276057953.

The spelling of 204157100 in words is "two hundred four million, one hundred fifty-seven thousand, one hundred".