23131001 has 2 divisors, whose sum is σ = 23131002. Its totient is φ = 23131000.

The previous prime is 23130997. The next prime is 23131027. The reversal of 23131001 is 10013132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20241001 + 2890000 = 4499^2 + 1700^2 .

It is a cyclic number.

It is not a de Polignac number, because 23131001 - 2² = 23130997 is a prime.

It is not a weakly prime, because it can be changed into another prime (23131081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11565500 + 11565501.

It is an arithmetic number, because the mean of its divisors is an integer number (11565501).

Almost surely, 2^23131001 is an apocalyptic number.

It is an amenable number.

23131001 is a deficient number, since it is larger than the sum of its proper divisors (1).

23131001 is an equidigital number, since it uses as much as digits as its factorization.

23131001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 23131001 is about 4809.4699292126. The cubic root of 23131001 is about 284.9256028236.

Adding to 23131001 its reverse (10013132), we get a palindrome (33144133).

The spelling of 23131001 in words is "twenty-three million, one hundred thirty-one thousand, one".