23131522 has 8 divisors (see below), whose sum is σ = 34731900. Its totient is φ = 11554224.

The previous prime is 23131517. The next prime is 23131523. The reversal of 23131522 is 22513132.

It can be written as a sum of positive squares in 2 ways, for example, as 23126481 + 5041 = 4809^2 + 71^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 23131522.

It is not an unprimeable number, because it can be changed into a prime (23131523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2997 + ... + 7432.

Almost surely, 2^23131522 is an apocalyptic number.

23131522 is a deficient number, since it is larger than the sum of its proper divisors (11600378).

23131522 is a wasteful number, since it uses less digits than its factorization.

23131522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11540.

The product of its digits is 360, while the sum is 19.

The square root of 23131522 is about 4809.5240928807. The cubic root of 23131522 is about 284.9277420180.

Adding to 23131522 its reverse (22513132), we get a palindrome (45644654).

It can be divided in two parts, 23131 and 522, that added together give a triangular number (23653 = T₂₁₇).

The spelling of 23131522 in words is "twenty-three million, one hundred thirty-one thousand, five hundred twenty-two".