22145323515 has 32 divisors (see below), whose sum is σ = 41064662016. Its totient is φ = 9980987520.

The previous prime is 22145323511. The next prime is 22145323549. The reversal of 22145323515 is 51532354122.

It is not a de Polignac number, because 22145323515 - 2² = 22145323511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22145323511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1477812 + ... + 1492721.

It is an arithmetic number, because the mean of its divisors is an integer number (1283270688).

Almost surely, 2^22145323515 is an apocalyptic number.

22145323515 is a deficient number, since it is larger than the sum of its proper divisors (18919338501).

22145323515 is a wasteful number, since it uses less digits than its factorization.

22145323515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2970619.

The product of its digits is 36000, while the sum is 33.

Adding to 22145323515 its reverse (51532354122), we get a palindrome (73677677637).

The spelling of 22145323515 in words is "twenty-two billion, one hundred forty-five million, three hundred twenty-three thousand, five hundred fifteen".