157998722 has 16 divisors (see below), whose sum is σ = 271182912. Its totient is φ = 67631760.

The previous prime is 157998719. The next prime is 157998739. The reversal of 157998722 is 227899751.

157998722 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 5972 + ... + 18752.

It is an arithmetic number, because the mean of its divisors is an integer number (16948932).

Almost surely, 2^157998722 is an apocalyptic number.

157998722 is a deficient number, since it is larger than the sum of its proper divisors (113184190).

157998722 is a wasteful number, since it uses less digits than its factorization.

157998722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13673.

The product of its digits is 635040, while the sum is 50.

The square root of 157998722 is about 12569.7542537633. The cubic root of 157998722 is about 540.6105599716.

The spelling of 157998722 in words is "one hundred fifty-seven million, nine hundred ninety-eight thousand, seven hundred twenty-two".