210157122 has 32 divisors (see below), whose sum is σ = 495857664. Its totient is φ = 58107600.

The previous prime is 210157099. The next prime is 210157127. The reversal of 210157122 is 221751012.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (210157127) 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, 79404 + ... + 82007.

It is an arithmetic number, because the mean of its divisors is an integer number (15495552).

Almost surely, 2^210157122 is an apocalyptic number.

210157122 is an abundant number, since it is smaller than the sum of its proper divisors (285700542).

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

210157122 is a wasteful number, since it uses less digits than its factorization.

210157122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161454.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 210157122 is about 14496.7969565694. The cubic root of 210157122 is about 594.5403997338.

The spelling of 210157122 in words is "two hundred ten million, one hundred fifty-seven thousand, one hundred twenty-two".