23131232251 has 2 divisors, whose sum is σ = 23131232252. Its totient is φ = 23131232250.

The previous prime is 23131232209. The next prime is 23131232281. The reversal of 23131232251 is 15223213132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23131232251 - 2⁷ = 23131232123 is a prime.

It is not a weakly prime, because it can be changed into another prime (23131232281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11565616125 + 11565616126.

It is an arithmetic number, because the mean of its divisors is an integer number (11565616126).

Almost surely, 2^23131232251 is an apocalyptic number.

23131232251 is a deficient number, since it is larger than the sum of its proper divisors (1).

23131232251 is an equidigital number, since it uses as much as digits as its factorization.

23131232251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 25.

Adding to 23131232251 its reverse (15223213132), we get a palindrome (38354445383).

The spelling of 23131232251 in words is "twenty-three billion, one hundred thirty-one million, two hundred thirty-two thousand, two hundred fifty-one".