157221372 has 96 divisors (see below), whose sum is σ = 484323840. Its totient is φ = 38430720.

The previous prime is 157221349. The next prime is 157221377. The reversal of 157221372 is 273122751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157221377) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10704 + ... + 20712.

It is an arithmetic number, because the mean of its divisors is an integer number (5045040).

Almost surely, 2^157221372 is an apocalyptic number.

157221372 is a gapful number since it is divisible by the number (12) 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 157221372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242161920).

157221372 is an abundant number, since it is smaller than the sum of its proper divisors (327102468).

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

157221372 is a wasteful number, since it uses less digits than its factorization.

157221372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10051 (or 10049 counting only the distinct ones).

The product of its digits is 5880, while the sum is 30.

The square root of 157221372 is about 12538.7946789155. The cubic root of 157221372 is about 539.7225048876.

The spelling of 157221372 in words is "one hundred fifty-seven million, two hundred twenty-one thousand, three hundred seventy-two".