22515215213 has 4 divisors (see below), whose sum is σ = 23700226560. Its totient is φ = 21330203868.

The previous prime is 22515215189. The next prime is 22515215221. The reversal of 22515215213 is 31251251522.

It is a happy number.

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 22515215213 - 2⁸ = 22515214957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22515215713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 592505645 + ... + 592505682.

It is an arithmetic number, because the mean of its divisors is an integer number (5925056640).

Almost surely, 2^22515215213 is an apocalyptic number.

It is an amenable number.

22515215213 is a deficient number, since it is larger than the sum of its proper divisors (1185011347).

22515215213 is a wasteful number, since it uses less digits than its factorization.

22515215213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185011346.

The product of its digits is 6000, while the sum is 29.

Adding to 22515215213 its reverse (31251251522), we get a palindrome (53766466735).

The spelling of 22515215213 in words is "twenty-two billion, five hundred fifteen million, two hundred fifteen thousand, two hundred thirteen".