157217452 has 24 divisors (see below), whose sum is σ = 322106400. Its totient is φ = 65735040.

The previous prime is 157217447. The next prime is 157217471. The reversal of 157217452 is 254712751.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67327 + ... + 69622.

It is an arithmetic number, because the mean of its divisors is an integer number (13421100).

Almost surely, 2^157217452 is an apocalyptic number.

It is an amenable number.

157217452 is an abundant number, since it is smaller than the sum of its proper divisors (164888948).

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

157217452 is a wasteful number, since it uses less digits than its factorization.

157217452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137001 (or 136999 counting only the distinct ones).

The product of its digits is 19600, while the sum is 34.

The square root of 157217452 is about 12538.6383630760. The cubic root of 157217452 is about 539.7180192171.

The spelling of 157217452 in words is "one hundred fifty-seven million, two hundred seventeen thousand, four hundred fifty-two".