212231311524 has 18 divisors (see below), whose sum is σ = 536473593110. Its totient is φ = 70743770496.

The previous prime is 212231311519. The next prime is 212231311543. The reversal of 212231311524 is 425113132212.

It is a happy number.

212231311524 is a `hidden beast` number, since 2 + 1 + 2 + 2 + 3 + 131 + 1 + 524 = 666.

It can be written as a sum of positive squares in only one way, i.e., 158856450624 + 53374860900 = 398568^2 + 231030^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2947657069 + ... + 2947657140.

Almost surely, 2^212231311524 is an apocalyptic number.

It is an amenable number.

212231311524 is an abundant number, since it is smaller than the sum of its proper divisors (324242281586).

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

212231311524 is a wasteful number, since it uses less digits than its factorization.

212231311524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5895314219 (or 5895314214 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

Adding to 212231311524 its reverse (425113132212), we get a palindrome (637344443736).

The spelling of 212231311524 in words is "two hundred twelve billion, two hundred thirty-one million, three hundred eleven thousand, five hundred twenty-four".