23131222447 has 2 divisors, whose sum is σ = 23131222448. Its totient is φ = 23131222446.

The previous prime is 23131222409. The next prime is 23131222451. The reversal of 23131222447 is 74422213132.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23131222447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23131222487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11565611223 + 11565611224.

It is an arithmetic number, because the mean of its divisors is an integer number (11565611224).

Almost surely, 2^23131222447 is an apocalyptic number.

23131222447 is a deficient number, since it is larger than the sum of its proper divisors (1).

23131222447 is an equidigital number, since it uses as much as digits as its factorization.

23131222447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 31.

Adding to 23131222447 its reverse (74422213132), we get a palindrome (97553435579).

The spelling of 23131222447 in words is "twenty-three billion, one hundred thirty-one million, two hundred twenty-two thousand, four hundred forty-seven".