231622612 has 72 divisors (see below), whose sum is σ = 460329912. Its totient is φ = 101836800.

The previous prime is 231622591. The next prime is 231622621. The reversal of 231622612 is 216226132.

It can be written as a sum of positive squares in 12 ways, for example, as 217739536 + 13883076 = 14756^2 + 3726^2 .

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, 1690608 + ... + 1690744.

It is an arithmetic number, because the mean of its divisors is an integer number (6393471).

Almost surely, 2^231622612 is an apocalyptic number.

It is an amenable number.

231622612 is a deficient number, since it is larger than the sum of its proper divisors (228707300).

231622612 is a wasteful number, since it uses less digits than its factorization.

231622612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269 (or 254 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 231622612 is about 15219.1528016510. The cubic root of 231622612 is about 614.1300074487.

Adding to 231622612 its reverse (216226132), we get a palindrome (447848744).

The spelling of 231622612 in words is "two hundred thirty-one million, six hundred twenty-two thousand, six hundred twelve".