20215122 has 8 divisors (see below), whose sum is σ = 40430256. Its totient is φ = 6738372.

The previous prime is 20215109. The next prime is 20215133. The reversal of 20215122 is 22151202.

It is a sphenic number, since it is the product of 3 distinct primes.

20215122 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1684588 + ... + 1684599.

It is an arithmetic number, because the mean of its divisors is an integer number (5053782).

Almost surely, 2^20215122 is an apocalyptic number.

20215122 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20215122 is a wasteful number, since it uses less digits than its factorization.

20215122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3369192.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 20215122 is about 4496.1229965382. The cubic root of 20215122 is about 272.4115112621.

Adding to 20215122 its reverse (22151202), we get a palindrome (42366324).

The spelling of 20215122 in words is "twenty million, two hundred fifteen thousand, one hundred twenty-two".