231212245 has 24 divisors (see below), whose sum is σ = 306001080. Its totient is φ = 167587200.

The previous prime is 231212231. The next prime is 231212269. The reversal of 231212245 is 542212132.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16208676 + 215003569 = 4026^2 + 14663^2 .

It is not a de Polignac number, because 231212245 - 2⁵ = 231212213 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 278491 + ... + 279319.

It is an arithmetic number, because the mean of its divisors is an integer number (12750045).

Almost surely, 2^231212245 is an apocalyptic number.

It is an amenable number.

231212245 is a deficient number, since it is larger than the sum of its proper divisors (74788835).

231212245 is a wasteful number, since it uses less digits than its factorization.

231212245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317 (or 1306 counting only the distinct ones).

The product of its digits is 960, while the sum is 22.

The square root of 231212245 is about 15205.6648983200. The cubic root of 231212245 is about 613.7671072587.

Adding to 231212245 its reverse (542212132), we get a palindrome (773424377).

The spelling of 231212245 in words is "two hundred thirty-one million, two hundred twelve thousand, two hundred forty-five".