22231518 has 16 divisors (see below), whose sum is σ = 44528400. Its totient is φ = 7399616.

The previous prime is 22231499. The next prime is 22231571. The reversal of 22231518 is 81513222.

It is a congruent 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, 2458 + ... + 7106.

It is an arithmetic number, because the mean of its divisors is an integer number (2783025).

Almost surely, 2^22231518 is an apocalyptic number.

22231518 is an abundant number, since it is smaller than the sum of its proper divisors (22296882).

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

22231518 is a wasteful number, since it uses less digits than its factorization.

22231518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5451.

The product of its digits is 960, while the sum is 24.

The square root of 22231518 is about 4715.0310709475. The cubic root of 22231518 is about 281.1834181155.

It can be divided in two parts, 2223 and 1518, that added together give a triangular number (3741 = T₈₆).

The spelling of 22231518 in words is "twenty-two million, two hundred thirty-one thousand, five hundred eighteen".