157731072 has 72 divisors (see below), whose sum is σ = 427032480. Its totient is φ = 51685888.

The previous prime is 157731061. The next prime is 157731073. The reversal of 157731072 is 270137751.

157731072 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (157731073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2673379 + ... + 2673437.

Almost surely, 2^157731072 is an apocalyptic number.

157731072 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 157731072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213516240).

157731072 is an abundant number, since it is smaller than the sum of its proper divisors (269301408).

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

157731072 is an frugal number, since it uses more digits than its factorization.

157731072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 10290, while the sum is 33.

The square root of 157731072 is about 12559.1031526937. The cubic root of 157731072 is about 540.3051224852.

The spelling of 157731072 in words is "one hundred fifty-seven million, seven hundred thirty-one thousand, seventy-two".