22256812013 has 4 divisors (see below), whose sum is σ = 22329310080. Its totient is φ = 22184313948.

The previous prime is 22256812009. The next prime is 22256812037. The reversal of 22256812013 is 31021865222.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31021865222 = 2 ⋅15510932611.

It is a cyclic number.

It is not a de Polignac number, because 22256812013 - 2² = 22256812009 is a prime.

It is a super-2 number, since 2×22256812013² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22256812213) 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, 36248573 + ... + 36249186.

It is an arithmetic number, because the mean of its divisors is an integer number (5582327520).

Almost surely, 2^22256812013 is an apocalyptic number.

It is an amenable number.

22256812013 is a deficient number, since it is larger than the sum of its proper divisors (72498067).

22256812013 is an equidigital number, since it uses as much as digits as its factorization.

22256812013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72498066.

The product of its (nonzero) digits is 11520, while the sum is 32.

The spelling of 22256812013 in words is "twenty-two billion, two hundred fifty-six million, eight hundred twelve thousand, thirteen".