23222331997 has 2 divisors, whose sum is σ = 23222331998. Its totient is φ = 23222331996.

The previous prime is 23222331949. The next prime is 23222332033. The reversal of 23222331997 is 79913322232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11887322841 + 11335009156 = 109029^2 + 106466^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23222331997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23222337997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11611165998 + 11611165999.

It is an arithmetic number, because the mean of its divisors is an integer number (11611165999).

Almost surely, 2^23222331997 is an apocalyptic number.

It is an amenable number.

23222331997 is a deficient number, since it is larger than the sum of its proper divisors (1).

23222331997 is an equidigital number, since it uses as much as digits as its factorization.

23222331997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 43.

The spelling of 23222331997 in words is "twenty-three billion, two hundred twenty-two million, three hundred thirty-one thousand, nine hundred ninety-seven".