23155444447 has 2 divisors, whose sum is σ = 23155444448. Its totient is φ = 23155444446.

The previous prime is 23155444427. The next prime is 23155444453. The reversal of 23155444447 is 74444455132.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23155444447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23155444427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11577722223 + 11577722224.

It is an arithmetic number, because the mean of its divisors is an integer number (11577722224).

Almost surely, 2^23155444447 is an apocalyptic number.

23155444447 is a deficient number, since it is larger than the sum of its proper divisors (1).

23155444447 is an equidigital number, since it uses as much as digits as its factorization.

23155444447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1075200, while the sum is 43.

Adding to 23155444447 its reverse (74444455132), we get a palindrome (97599899579).

The spelling of 23155444447 in words is "twenty-three billion, one hundred fifty-five million, four hundred forty-four thousand, four hundred forty-seven".