231133412 has 6 divisors (see below), whose sum is σ = 404483478. Its totient is φ = 115566704.

The previous prime is 231133391. The next prime is 231133429. The reversal of 231133412 is 214331132.

231133412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 211295296 + 19838116 = 14536^2 + 4454^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28891673 + ... + 28891680.

It is an arithmetic number, because the mean of its divisors is an integer number (67413913).

Almost surely, 2^231133412 is an apocalyptic number.

It is an amenable number.

231133412 is a deficient number, since it is larger than the sum of its proper divisors (173350066).

231133412 is a wasteful number, since it uses less digits than its factorization.

231133412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57783357 (or 57783355 counting only the distinct ones).

The product of its digits is 432, while the sum is 20.

The square root of 231133412 is about 15203.0724526327. The cubic root of 231133412 is about 613.6973436490.

Adding to 231133412 its reverse (214331132), we get a palindrome (445464544).

The spelling of 231133412 in words is "two hundred thirty-one million, one hundred thirty-three thousand, four hundred twelve".