157721080 has 48 divisors (see below), whose sum is σ = 390078360. Its totient is φ = 57351360.

The previous prime is 157721077. The next prime is 157721089. The reversal of 157721080 is 80127751.

It is a happy number.

157721080 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157721089) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11454 + ... + 21133.

Almost surely, 2^157721080 is an apocalyptic number.

157721080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157721080 is an abundant number, since it is smaller than the sum of its proper divisors (232357280).

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

157721080 is a wasteful number, since it uses less digits than its factorization.

157721080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32620 (or 32605 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 157721080 is about 12558.7053472880. The cubic root of 157721080 is about 540.2937131018.

The spelling of 157721080 in words is "one hundred fifty-seven million, seven hundred twenty-one thousand, eighty".