23131322 has 32 divisors (see below), whose sum is σ = 39372480. Its totient is φ = 10126080.

The previous prime is 23131289. The next prime is 23131333. The reversal of 23131322 is 22313132.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 23131322.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39113 + ... + 39699.

It is an arithmetic number, because the mean of its divisors is an integer number (1230390).

Almost surely, 2^23131322 is an apocalyptic number.

23131322 is a deficient number, since it is larger than the sum of its proper divisors (16241158).

23131322 is a wasteful number, since it uses less digits than its factorization.

23131322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686.

The product of its digits is 216, while the sum is 17.

The square root of 23131322 is about 4809.5033007578. The cubic root of 23131322 is about 284.9269208339.

Adding to 23131322 its reverse (22313132), we get a palindrome (45444454).

It can be divided in two parts, 2313132 and 2, that multiplied together give a palindrome (4626264).

The spelling of 23131322 in words is "twenty-three million, one hundred thirty-one thousand, three hundred twenty-two".