23131005 has 16 divisors (see below), whose sum is σ = 37147200. Its totient is φ = 12290688.

The previous prime is 23131001. The next prime is 23131027. The reversal of 23131005 is 50013132.

It is a happy number.

It is not a de Polignac number, because 23131005 - 2² = 23131001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23131001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1521 + ... + 6969.

It is an arithmetic number, because the mean of its divisors is an integer number (2321700).

Almost surely, 2^23131005 is an apocalyptic number.

It is an amenable number.

23131005 is a deficient number, since it is larger than the sum of its proper divisors (14016195).

23131005 is a wasteful number, since it uses less digits than its factorization.

23131005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5740.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 23131005 is about 4809.4703450588. The cubic root of 23131005 is about 284.9256192475.

Adding to 23131005 its reverse (50013132), we get a palindrome (73144137).

The spelling of 23131005 in words is "twenty-three million, one hundred thirty-one thousand, five".