157224381 has 24 divisors (see below), whose sum is σ = 228172224. Its totient is φ = 96222720.

The previous prime is 157224337. The next prime is 157224391. The reversal of 157224381 is 183422751.

It is not a de Polignac number, because 157224381 - 2⁷ = 157224253 is a prime.

It is a super-2 number, since 2×157224381² = 49439011961666322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157224311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33336 + ... + 37758.

It is an arithmetic number, because the mean of its divisors is an integer number (9507176).

Almost surely, 2^157224381 is an apocalyptic number.

It is an amenable number.

157224381 is a deficient number, since it is larger than the sum of its proper divisors (70947843).

157224381 is a wasteful number, since it uses less digits than its factorization.

157224381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4501 (or 4484 counting only the distinct ones).

The product of its digits is 13440, while the sum is 33.

The square root of 157224381 is about 12538.9146659510. The cubic root of 157224381 is about 539.7259480468.

The spelling of 157224381 in words is "one hundred fifty-seven million, two hundred twenty-four thousand, three hundred eighty-one".