23181498247 has 2 divisors, whose sum is σ = 23181498248. Its totient is φ = 23181498246.

The previous prime is 23181498239. The next prime is 23181498253. The reversal of 23181498247 is 74289418132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23181498247 - 2³ = 23181498239 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23181498247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23181498287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11590749123 + 11590749124.

It is an arithmetic number, because the mean of its divisors is an integer number (11590749124).

Almost surely, 2^23181498247 is an apocalyptic number.

23181498247 is a deficient number, since it is larger than the sum of its proper divisors (1).

23181498247 is an equidigital number, since it uses as much as digits as its factorization.

23181498247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 49.

The spelling of 23181498247 in words is "twenty-three billion, one hundred eighty-one million, four hundred ninety-eight thousand, two hundred forty-seven".