22157916 has 24 divisors (see below), whose sum is σ = 56402304. Its totient is φ = 6714480.

The previous prime is 22157903. The next prime is 22157923. The reversal of 22157916 is 61975122.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

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, 83800 + ... + 84063.

It is an arithmetic number, because the mean of its divisors is an integer number (2350096).

Almost surely, 2^22157916 is an apocalyptic number.

It is an amenable number.

22157916 is an abundant number, since it is smaller than the sum of its proper divisors (34244388).

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

22157916 is a wasteful number, since it uses less digits than its factorization.

22157916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167881 (or 167879 counting only the distinct ones).

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

The square root of 22157916 is about 4707.2195614821. The cubic root of 22157916 is about 280.8727699160.

It can be divided in two parts, 2215791 and 6, that multiplied together give a triangular number (13294746 = T₅₁₅₆).

The spelling of 22157916 in words is "twenty-two million, one hundred fifty-seven thousand, nine hundred sixteen".