157012220 has 24 divisors (see below), whose sum is σ = 330069600. Its totient is φ = 62739392.

The previous prime is 157012217. The next prime is 157012267. The reversal of 157012220 is 22210751.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 157012192 and 157012201.

It is a congruent number.

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, 18641 + ... + 25719.

It is an arithmetic number, because the mean of its divisors is an integer number (13752900).

Almost surely, 2^157012220 is an apocalyptic number.

157012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157012220 is an abundant number, since it is smaller than the sum of its proper divisors (173057380).

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

157012220 is a wasteful number, since it uses less digits than its factorization.

157012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8197 (or 8195 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 157012220 is about 12530.4517077398. The cubic root of 157012220 is about 539.4830672641.

Adding to 157012220 its reverse (22210751), we get a palindrome (179222971).

The spelling of 157012220 in words is "one hundred fifty-seven million, twelve thousand, two hundred twenty".