22115305513 has 4 divisors (see below), whose sum is σ = 25274634880. Its totient is φ = 18955976148.

The previous prime is 22115305441. The next prime is 22115305549. The reversal of 22115305513 is 31550351122.

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 22115305513 - 2²¹ = 22113208361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22115303513) 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, 1579664673 + ... + 1579664686.

It is an arithmetic number, because the mean of its divisors is an integer number (6318658720).

Almost surely, 2^22115305513 is an apocalyptic number.

It is an amenable number.

22115305513 is a deficient number, since it is larger than the sum of its proper divisors (3159329367).

22115305513 is an equidigital number, since it uses as much as digits as its factorization.

22115305513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3159329366.

The product of its (nonzero) digits is 4500, while the sum is 28.

Adding to 22115305513 its reverse (31550351122), we get a palindrome (53665656635).

The spelling of 22115305513 in words is "twenty-two billion, one hundred fifteen million, three hundred five thousand, five hundred thirteen".