23256021225 has 24 divisors (see below), whose sum is σ = 38481342592. Its totient is φ = 12393086400.

The previous prime is 23256021163. The next prime is 23256021227. The reversal of 23256021225 is 52212065232.

It is not a de Polignac number, because 23256021225 - 2⁸ = 23256020969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23256021192 and 23256021201.

It is not an unprimeable number, because it can be changed into a prime (23256021227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33622 + ... + 218271.

Almost surely, 2^23256021225 is an apocalyptic number.

23256021225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23256021225 is a deficient number, since it is larger than the sum of its proper divisors (15225321367).

23256021225 is a wasteful number, since it uses less digits than its factorization.

23256021225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253137 (or 253132 counting only the distinct ones).

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

Adding to 23256021225 its reverse (52212065232), we get a palindrome (75468086457).

The spelling of 23256021225 in words is "twenty-three billion, two hundred fifty-six million, twenty-one thousand, two hundred twenty-five".