216312323513 has 72 divisors (see below), whose sum is σ = 270160563456. Its totient is φ = 172656506880.

The previous prime is 216312323501. The next prime is 216312323519. The reversal of 216312323513 is 315323213612.

It is not a de Polignac number, because 216312323513 - 2¹⁰ = 216312322489 is a prime.

It is a super-2 number, since 2×216312323513² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216312323513.

It is not an unprimeable number, because it can be changed into a prime (216312323519) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 90771920 + ... + 90774302.

It is an arithmetic number, because the mean of its divisors is an integer number (3752230048).

Almost surely, 2^216312323513 is an apocalyptic number.

216312323513 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

216312323513 is a deficient number, since it is larger than the sum of its proper divisors (53848239943).

216312323513 is a wasteful number, since it uses less digits than its factorization.

216312323513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2647 (or 2623 counting only the distinct ones).

The product of its digits is 19440, while the sum is 32.

The spelling of 216312323513 in words is "two hundred sixteen billion, three hundred twelve million, three hundred twenty-three thousand, five hundred thirteen".