23145131 has 8 divisors (see below), whose sum is σ = 23514624. Its totient is φ = 22777960.

The previous prime is 23145119. The next prime is 23145167. The reversal of 23145131 is 13154132.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23145131 is a prime.

It is a super-2 number, since 2×23145131² = 1071394178014322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23145631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35450 + ... + 36096.

It is an arithmetic number, because the mean of its divisors is an integer number (2939328).

Almost surely, 2^23145131 is an apocalyptic number.

23145131 is a deficient number, since it is larger than the sum of its proper divisors (369493).

23145131 is an equidigital number, since it uses as much as digits as its factorization.

23145131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161.

The product of its digits is 360, while the sum is 20.

The square root of 23145131 is about 4810.9386817959. The cubic root of 23145131 is about 284.9836083729.

Adding to 23145131 its reverse (13154132), we get a palindrome (36299263).

Subtracting from 23145131 its reverse (13154132), we obtain a palindrome (9990999).

The spelling of 23145131 in words is "twenty-three million, one hundred forty-five thousand, one hundred thirty-one".