22715131 has 4 divisors (see below), whose sum is σ = 22725064. Its totient is φ = 22705200.

The previous prime is 22715123. The next prime is 22715153. The reversal of 22715131 is 13151722.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22715131 - 2³ = 22715123 is a prime.

It is a super-2 number, since 2×22715131² = 1031954352694322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22715831) 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, 391 + ... + 6751.

It is an arithmetic number, because the mean of its divisors is an integer number (5681266).

Almost surely, 2^22715131 is an apocalyptic number.

22715131 is a deficient number, since it is larger than the sum of its proper divisors (9933).

22715131 is an equidigital number, since it uses as much as digits as its factorization.

22715131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9932.

The product of its digits is 420, while the sum is 22.

The square root of 22715131 is about 4766.0393410042. The cubic root of 22715131 is about 283.2077162492.

Adding to 22715131 its reverse (13151722), we get a palindrome (35866853).

The spelling of 22715131 in words is "twenty-two million, seven hundred fifteen thousand, one hundred thirty-one".