23221255513 has 4 divisors (see below), whose sum is σ = 23275133568. Its totient is φ = 23167377460.

The previous prime is 23221255493. The next prime is 23221255523. The reversal of 23221255513 is 31555212232.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23221255513 - 2⁵ = 23221255481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23221255523) 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, 26938381 + ... + 26939242.

It is an arithmetic number, because the mean of its divisors is an integer number (5818783392).

Almost surely, 2^23221255513 is an apocalyptic number.

It is an amenable number.

23221255513 is a deficient number, since it is larger than the sum of its proper divisors (53878055).

23221255513 is an equidigital number, since it uses as much as digits as its factorization.

23221255513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53878054.

The product of its digits is 18000, while the sum is 31.

Adding to 23221255513 its reverse (31555212232), we get a palindrome (54776467745).

The spelling of 23221255513 in words is "twenty-three billion, two hundred twenty-one million, two hundred fifty-five thousand, five hundred thirteen".