23131330 has 32 divisors (see below), whose sum is σ = 43784064. Its totient is φ = 8781696.

The previous prime is 23131289. The next prime is 23131333. The reversal of 23131330 is 3313132.

It is not an unprimeable number, because it can be changed into a prime (23131333) 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 15 ways as a sum of consecutive naturals, for example, 37182 + ... + 37798.

It is an arithmetic number, because the mean of its divisors is an integer number (1368252).

Almost surely, 2^23131330 is an apocalyptic number.

23131330 is a deficient number, since it is larger than the sum of its proper divisors (20652734).

23131330 is a wasteful number, since it uses less digits than its factorization.

23131330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810.

The product of its (nonzero) digits is 162, while the sum is 16.

The square root of 23131330 is about 4809.5041324444. The cubic root of 23131330 is about 284.9269536814.

Adding to 23131330 its reverse (3313132), we get a palindrome (26444462).

The spelling of 23131330 in words is "twenty-three million, one hundred thirty-one thousand, three hundred thirty".