23156223447 has 16 divisors (see below), whose sum is σ = 37361302272. Its totient is φ = 12453767040.

The previous prime is 23156223443. The next prime is 23156223463. The reversal of 23156223447 is 74432265132.

It is not a de Polignac number, because 23156223447 - 2² = 23156223443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23156223443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32431329 + ... + 32432042.

It is an arithmetic number, because the mean of its divisors is an integer number (2335081392).

Almost surely, 2^23156223447 is an apocalyptic number.

23156223447 is a deficient number, since it is larger than the sum of its proper divisors (14205078825).

23156223447 is a wasteful number, since it uses less digits than its factorization.

23156223447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64863398.

The product of its digits is 241920, while the sum is 39.

Adding to 23156223447 its reverse (74432265132), we get a palindrome (97588488579).

The spelling of 23156223447 in words is "twenty-three billion, one hundred fifty-six million, two hundred twenty-three thousand, four hundred forty-seven".