231312213224 has 16 divisors (see below), whose sum is σ = 438181642500. Its totient is φ = 114463775232.

The previous prime is 231312213211. The next prime is 231312213239. The reversal of 231312213224 is 422312213132.

It can be written as a sum of positive squares in 2 ways, for example, as 225323001124 + 5989212100 = 474682^2 + 77390^2 .

It is a super-3 number, since 3×231312213224³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231312213193 and 231312213202.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149040599 + ... + 149042150.

Almost surely, 2^231312213224 is an apocalyptic number.

It is an amenable number.

231312213224 is a deficient number, since it is larger than the sum of its proper divisors (206869429276).

231312213224 is a wasteful number, since it uses less digits than its factorization.

231312213224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298082852 (or 298082848 counting only the distinct ones).

The product of its digits is 3456, while the sum is 26.

Adding to 231312213224 its reverse (422312213132), we get a palindrome (653624426356).

The spelling of 231312213224 in words is "two hundred thirty-one billion, three hundred twelve million, two hundred thirteen thousand, two hundred twenty-four".