22315212520 has 32 divisors (see below), whose sum is σ = 53162713800. Its totient is φ = 8401020928.

The previous prime is 22315212497. The next prime is 22315212529. The reversal of 22315212520 is 2521251322.

It can be written as a sum of positive squares in 4 ways, for example, as 22313786884 + 1425636 = 149378^2 + 1194^2 .

It is a super-3 number, since 3×22315212520³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (22315212529) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 16407565 + ... + 16408924.

Almost surely, 2^22315212520 is an apocalyptic number.

22315212520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22315212520 is an abundant number, since it is smaller than the sum of its proper divisors (30847501280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22315212520 is a wasteful number, since it uses less digits than its factorization.

22315212520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32816517 (or 32816513 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 22315212520 its reverse (2521251322), we get a palindrome (24836463842).

The spelling of 22315212520 in words is "twenty-two billion, three hundred fifteen million, two hundred twelve thousand, five hundred twenty".