157715220 has 96 divisors (see below), whose sum is σ = 478114560. Its totient is φ = 38615040.

The previous prime is 157715203. The next prime is 157715231. The reversal of 157715220 is 22517751.

It is a super-3 number, since 3×157715220³ (a number of 26 digits) contains 333 as substring.

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 31 ways as a sum of consecutive naturals, for example, 187561 + ... + 188399.

It is an arithmetic number, because the mean of its divisors is an integer number (4980360).

Almost surely, 2^157715220 is an apocalyptic number.

157715220 is a gapful number since it is divisible by the number (10) 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 157715220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239057280).

157715220 is an abundant number, since it is smaller than the sum of its proper divisors (320399340).

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

157715220 is a wasteful number, since it uses less digits than its factorization.

157715220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105 (or 1103 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 30.

The square root of 157715220 is about 12558.4720408177. The cubic root of 157715220 is about 540.2870216260.

The spelling of 157715220 in words is "one hundred fifty-seven million, seven hundred fifteen thousand, two hundred twenty".