215245131312 has 40 divisors (see below), whose sum is σ = 556075035904. Its totient is φ = 71745136704.

The previous prime is 215245131289. The next prime is 215245131319. The reversal of 215245131312 is 213131542512.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 215245131312.

It is not an unprimeable number, because it can be changed into a prime (215245131319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1125933 + ... + 1303155.

Almost surely, 2^215245131312 is an apocalyptic number.

It is an amenable number.

215245131312 is an abundant number, since it is smaller than the sum of its proper divisors (340829904592).

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

215245131312 is a wasteful number, since it uses less digits than its factorization.

215245131312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202537 (or 202531 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

Adding to 215245131312 its reverse (213131542512), we get a palindrome (428376673824).

The spelling of 215245131312 in words is "two hundred fifteen billion, two hundred forty-five million, one hundred thirty-one thousand, three hundred twelve".