23131730 has 16 divisors (see below), whose sum is σ = 44086680. Its totient is φ = 8708352.

The previous prime is 23131711. The next prime is 23131741. The reversal of 23131730 is 3713132.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20529961 + 2601769 = 4531^2 + 1613^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67865 + ... + 68204.

Almost surely, 2^23131730 is an apocalyptic number.

23131730 is a deficient number, since it is larger than the sum of its proper divisors (20954950).

23131730 is a wasteful number, since it uses less digits than its factorization.

23131730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136093.

The product of its (nonzero) digits is 378, while the sum is 20.

The square root of 23131730 is about 4809.5457165932. The cubic root of 23131730 is about 284.9285960444.

Adding to 23131730 its reverse (3713132), we get a palindrome (26844862).

The spelling of 23131730 in words is "twenty-three million, one hundred thirty-one thousand, seven hundred thirty".