22515015213 has 12 divisors (see below), whose sum is σ = 32529412188. Its totient is φ = 15006445440.

The previous prime is 22515015209. The next prime is 22515015241. The reversal of 22515015213 is 31251051522.

It can be written as a sum of positive squares in 2 ways, for example, as 17261229924 + 5253785289 = 131382^2 + 72483^2 .

It is not a de Polignac number, because 22515015213 - 2² = 22515015209 is a prime.

It is a super-3 number, since 3×22515015213³ (a number of 32 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22515015613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 256770 + ... + 333107.

It is an arithmetic number, because the mean of its divisors is an integer number (2710784349).

Almost surely, 2^22515015213 is an apocalyptic number.

It is an amenable number.

22515015213 is a deficient number, since it is larger than the sum of its proper divisors (10014396975).

22515015213 is a wasteful number, since it uses less digits than its factorization.

22515015213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594124 (or 594121 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

Adding to 22515015213 its reverse (31251051522), we get a palindrome (53766066735).

The spelling of 22515015213 in words is "twenty-two billion, five hundred fifteen million, fifteen thousand, two hundred thirteen".