21162522 has 16 divisors (see below), whose sum is σ = 43690752. Its totient is φ = 6826560.

The previous prime is 21162521. The next prime is 21162539. The reversal of 21162522 is 22526112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21162521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56703 + ... + 57074.

It is an arithmetic number, because the mean of its divisors is an integer number (2730672).

Almost surely, 2^21162522 is an apocalyptic number.

21162522 is an abundant number, since it is smaller than the sum of its proper divisors (22528230).

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

21162522 is a wasteful number, since it uses less digits than its factorization.

21162522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113813.

The product of its digits is 480, while the sum is 21.

The square root of 21162522 is about 4600.2741222671. The cubic root of 21162522 is about 276.6023130593.

Adding to 21162522 its reverse (22526112), we get a palindrome (43688634).

The spelling of 21162522 in words is "twenty-one million, one hundred sixty-two thousand, five hundred twenty-two".