157117212 has 96 divisors (see below), whose sum is σ = 473303040. Its totient is φ = 44141760.

The previous prime is 157117189. The next prime is 157117229. The reversal of 157117212 is 212711751.

157117212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44413 + ... + 47819.

It is an arithmetic number, because the mean of its divisors is an integer number (4930240).

Almost surely, 2^157117212 is an apocalyptic number.

157117212 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 157117212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236651520).

157117212 is an abundant number, since it is smaller than the sum of its proper divisors (316185828).

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

157117212 is a wasteful number, since it uses less digits than its factorization.

157117212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3488 (or 3480 counting only the distinct ones).

The product of its digits is 980, while the sum is 27.

The square root of 157117212 is about 12534.6404814817. The cubic root of 157117212 is about 539.6032888744.

Adding to 157117212 its reverse (212711751), we get a palindrome (369828963).

The spelling of 157117212 in words is "one hundred fifty-seven million, one hundred seventeen thousand, two hundred twelve".