23221312409 has 2 divisors, whose sum is σ = 23221312410. Its totient is φ = 23221312408.

The previous prime is 23221312399. The next prime is 23221312421. The reversal of 23221312409 is 90421312232.

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., 22621062409 + 600250000 = 150403^2 + 24500^2 .

It is a cyclic number.

It is not a de Polignac number, because 23221312409 - 2²⁸ = 22952876953 is a prime.

It is not a weakly prime, because it can be changed into another prime (23221312459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11610656204 + 11610656205.

It is an arithmetic number, because the mean of its divisors is an integer number (11610656205).

Almost surely, 2^23221312409 is an apocalyptic number.

It is an amenable number.

23221312409 is a deficient number, since it is larger than the sum of its proper divisors (1).

23221312409 is an equidigital number, since it uses as much as digits as its factorization.

23221312409 is an evil number, because the sum of its binary digits is even.

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

The spelling of 23221312409 in words is "twenty-three billion, two hundred twenty-one million, three hundred twelve thousand, four hundred nine".