22531536 has 60 divisors (see below), whose sum is σ = 65808288. Its totient is φ = 7182912.

The previous prime is 22531493. The next prime is 22531543. The reversal of 22531536 is 63513522.

It is a super-2 number, since 2×22531536² = 1015340229038592, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90 + ... + 6713.

Almost surely, 2^22531536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22531536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32904144).

22531536 is an abundant number, since it is smaller than the sum of its proper divisors (43276752).

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

22531536 is a wasteful number, since it uses less digits than its factorization.

22531536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6840 (or 6831 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 22531536 is about 4746.7395125496. The cubic root of 22531536 is about 282.4426427004.

The spelling of 22531536 in words is "twenty-two million, five hundred thirty-one thousand, five hundred thirty-six".