22515313465 has 4 divisors (see below), whose sum is σ = 27018376164. Its totient is φ = 18012250768.

The previous prime is 22515313453. The next prime is 22515313501. The reversal of 22515313465 is 56431351522.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6117742656 + 16397570809 = 78216^2 + 128053^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22515313465 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2251531342 + ... + 2251531351.

It is an arithmetic number, because the mean of its divisors is an integer number (6754594041).

Almost surely, 2^22515313465 is an apocalyptic number.

It is an amenable number.

22515313465 is a deficient number, since it is larger than the sum of its proper divisors (4503062699).

22515313465 is an equidigital number, since it uses as much as digits as its factorization.

22515313465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4503062698.

The product of its digits is 108000, while the sum is 37.

Adding to 22515313465 its reverse (56431351522), we get a palindrome (78946664987).

The spelling of 22515313465 in words is "twenty-two billion, five hundred fifteen million, three hundred thirteen thousand, four hundred sixty-five".