23131222409 has 2 divisors, whose sum is σ = 23131222410. Its totient is φ = 23131222408.

The previous prime is 23131222399. The next prime is 23131222447. The reversal of 23131222409 is 90422213132.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23114641225 + 16581184 = 152035^2 + 4072^2 .

It is a cyclic number.

It is not a de Polignac number, because 23131222409 - 2⁴ = 23131222393 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (23131225409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11565611204 + 11565611205.

It is an arithmetic number, because the mean of its divisors is an integer number (11565611205).

Almost surely, 2^23131222409 is an apocalyptic number.

It is an amenable number.

23131222409 is a deficient number, since it is larger than the sum of its proper divisors (1).

23131222409 is an equidigital number, since it uses as much as digits as its factorization.

23131222409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 23131222409 in words is "twenty-three billion, one hundred thirty-one million, two hundred twenty-two thousand, four hundred nine".