23425221531 has 4 divisors (see below), whose sum is σ = 31233628712. Its totient is φ = 15616814352.

The previous prime is 23425221433. The next prime is 23425221557. The reversal of 23425221531 is 13512252432.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 23425221531 - 2¹⁵ = 23425188763 is a prime.

It is a super-2 number, since 2×23425221531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23425221571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3904203586 + ... + 3904203591.

It is an arithmetic number, because the mean of its divisors is an integer number (7808407178).

Almost surely, 2^23425221531 is an apocalyptic number.

23425221531 is a deficient number, since it is larger than the sum of its proper divisors (7808407181).

23425221531 is an equidigital number, since it uses as much as digits as its factorization.

23425221531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7808407180.

The product of its digits is 14400, while the sum is 30.

Adding to 23425221531 its reverse (13512252432), we get a palindrome (36937473963).

The spelling of 23425221531 in words is "twenty-three billion, four hundred twenty-five million, two hundred twenty-one thousand, five hundred thirty-one".