22536139 has 4 divisors (see below), whose sum is σ = 22616056. Its totient is φ = 22456224.

The previous prime is 22536133. The next prime is 22536167. The reversal of 22536139 is 93163522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93163522 = 2 ⋅46581761.

It is a cyclic number.

It is not a de Polignac number, because 22536139 - 2³ = 22536131 is a prime.

It is a super-2 number, since 2×22536139² = 1015755122054642, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22536139.

It is not an unprimeable number, because it can be changed into a prime (22536131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39534 + ... + 40099.

It is an arithmetic number, because the mean of its divisors is an integer number (5654014).

Almost surely, 2^22536139 is an apocalyptic number.

22536139 is a deficient number, since it is larger than the sum of its proper divisors (79917).

22536139 is an equidigital number, since it uses as much as digits as its factorization.

22536139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79916.

The product of its digits is 9720, while the sum is 31.

The square root of 22536139 is about 4747.2243469211. The cubic root of 22536139 is about 282.4618749292.

The spelling of 22536139 in words is "twenty-two million, five hundred thirty-six thousand, one hundred thirty-nine".