23221240391 has 2 divisors, whose sum is σ = 23221240392. Its totient is φ = 23221240390.

The previous prime is 23221240373. The next prime is 23221240409. The reversal of 23221240391 is 19304212232.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (23221240373) and next prime (23221240409).

It is a cyclic number.

It is not a de Polignac number, because 23221240391 - 2¹⁸ = 23220978247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23221200391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11610620195 + 11610620196.

It is an arithmetic number, because the mean of its divisors is an integer number (11610620196).

Almost surely, 2^23221240391 is an apocalyptic number.

23221240391 is a deficient number, since it is larger than the sum of its proper divisors (1).

23221240391 is an equidigital number, since it uses as much as digits as its factorization.

23221240391 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 23221240391 in words is "twenty-three billion, two hundred twenty-one million, two hundred forty thousand, three hundred ninety-one".