157221180 has 72 divisors (see below), whose sum is σ = 493365600. Its totient is φ = 40478592.

The previous prime is 157221167. The next prime is 157221191. The reversal of 157221180 is 81122751.

157221180 is a `hidden beast` number, since 1 + 572 + 2 + 11 + 80 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9840 + ... + 20279.

It is an arithmetic number, because the mean of its divisors is an integer number (6852300).

Almost surely, 2^157221180 is an apocalyptic number.

157221180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157221180 is an abundant number, since it is smaller than the sum of its proper divisors (336144420).

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

157221180 is a wasteful number, since it uses less digits than its factorization.

157221180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30163 (or 30158 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

The square root of 157221180 is about 12538.7870226749. The cubic root of 157221180 is about 539.7222851830.

The spelling of 157221180 in words is "one hundred fifty-seven million, two hundred twenty-one thousand, one hundred eighty".