157981212 has 48 divisors (see below), whose sum is σ = 423712800. Its totient is φ = 50843520.

The previous prime is 157981211. The next prime is 157981217. The reversal of 157981212 is 212189751.

It is a happy number.

157981212 is a `hidden beast` number, since 1 + 579 + 81 + 2 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157981211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22089 + ... + 28352.

It is an arithmetic number, because the mean of its divisors is an integer number (8827350).

Almost surely, 2^157981212 is an apocalyptic number.

157981212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

157981212 is an abundant number, since it is smaller than the sum of its proper divisors (265731588).

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

157981212 is a wasteful number, since it uses less digits than its factorization.

157981212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50483 (or 50475 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 157981212 is about 12569.0577212455. The cubic root of 157981212 is about 540.5905884164.

The spelling of 157981212 in words is "one hundred fifty-seven million, nine hundred eighty-one thousand, two hundred twelve".