157122690 has 16 divisors (see below), whose sum is σ = 377094528. Its totient is φ = 41899376.

The previous prime is 157122671. The next prime is 157122727. The reversal of 157122690 is 96221751.

It is a super-2 number, since 2×157122690² = 49375079425672200, which contains 22 as substring.

It is a Curzon 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, 2618682 + ... + 2618741.

It is an arithmetic number, because the mean of its divisors is an integer number (23568408).

Almost surely, 2^157122690 is an apocalyptic number.

157122690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

157122690 is an abundant number, since it is smaller than the sum of its proper divisors (219971838).

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

157122690 is a wasteful number, since it uses less digits than its factorization.

157122690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5237433.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 157122690 is about 12534.8589940214. The cubic root of 157122690 is about 539.6095600151.

The spelling of 157122690 in words is "one hundred fifty-seven million, one hundred twenty-two thousand, six hundred ninety".