231212853 has 16 divisors (see below), whose sum is σ = 354350400. Its totient is φ = 148826160.

The previous prime is 231212837. The next prime is 231212897. The reversal of 231212853 is 358212132.

It is not a de Polignac number, because 231212853 - 2⁴ = 231212837 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231212153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146863 + ... + 148428.

It is an arithmetic number, because the mean of its divisors is an integer number (22146900).

Almost surely, 2^231212853 is an apocalyptic number.

It is an amenable number.

231212853 is a deficient number, since it is larger than the sum of its proper divisors (123137547).

231212853 is a wasteful number, since it uses less digits than its factorization.

231212853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295329 (or 295323 counting only the distinct ones).

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

The square root of 231212853 is about 15205.6848908558. The cubic root of 231212853 is about 613.7676452494.

Adding to 231212853 its reverse (358212132), we get a palindrome (589424985).

The spelling of 231212853 in words is "two hundred thirty-one million, two hundred twelve thousand, eight hundred fifty-three".