23251221423 has 16 divisors (see below), whose sum is σ = 35096185440. Its totient is φ = 15208345152.

The previous prime is 23251221403. The next prime is 23251221437. The reversal of 23251221423 is 32412215232.

23251221423 is a `hidden beast` number, since 2 + 3 + 2 + 512 + 2 + 142 + 3 = 666.

It is not a de Polignac number, because 23251221423 - 2⁶ = 23251221359 is a prime.

It is a super-2 number, since 2×23251221423² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23251221403) 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, 8122686 + ... + 8125547.

It is an arithmetic number, because the mean of its divisors is an integer number (2193511590).

Almost surely, 2^23251221423 is an apocalyptic number.

23251221423 is a deficient number, since it is larger than the sum of its proper divisors (11844964017).

23251221423 is a wasteful number, since it uses less digits than its factorization.

23251221423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16248295 (or 16248289 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

Adding to 23251221423 its reverse (32412215232), we get a palindrome (55663436655).

The spelling of 23251221423 in words is "twenty-three billion, two hundred fifty-one million, two hundred twenty-one thousand, four hundred twenty-three".