157226772 has 24 divisors (see below), whose sum is σ = 367133536. Its totient is φ = 52370208.

The previous prime is 157226749. The next prime is 157226789. The reversal of 157226772 is 277622751.

157226772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 157226772.

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, 15498 + ... + 23550.

Almost surely, 2^157226772 is an apocalyptic number.

157226772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

157226772 is an abundant number, since it is smaller than the sum of its proper divisors (209906764).

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

157226772 is a wasteful number, since it uses less digits than its factorization.

157226772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9687 (or 9685 counting only the distinct ones).

The product of its digits is 82320, while the sum is 39.

The square root of 157226772 is about 12539.0100087686. The cubic root of 157226772 is about 539.7286840054.

The spelling of 157226772 in words is "one hundred fifty-seven million, two hundred twenty-six thousand, seven hundred seventy-two".