22522731 has 16 divisors (see below), whose sum is σ = 37440768. Its totient is φ = 11700000.

The previous prime is 22522693. The next prime is 22522757. The reversal of 22522731 is 13722522.

It is a happy number.

It is not a de Polignac number, because 22522731 - 2⁹ = 22522219 is a prime.

It is a super-2 number, since 2×22522731² = 1014546823396722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22524731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48520 + ... + 48981.

It is an arithmetic number, because the mean of its divisors is an integer number (2340048).

Almost surely, 2^22522731 is an apocalyptic number.

22522731 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

22522731 is a deficient number, since it is larger than the sum of its proper divisors (14918037).

22522731 is a wasteful number, since it uses less digits than its factorization.

22522731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97522.

The product of its digits is 1680, while the sum is 24.

The square root of 22522731 is about 4745.8119431768. The cubic root of 22522731 is about 282.4058464002.

It can be divided in two parts, 22 and 522731, that added together give a triangular number (522753 = T₁₀₂₂).

The spelling of 22522731 in words is "twenty-two million, five hundred twenty-two thousand, seven hundred thirty-one".