231279238 has 4 divisors (see below), whose sum is σ = 346918860. Its totient is φ = 115639618.

The previous prime is 231279197. The next prime is 231279353. The reversal of 231279238 is 832972132.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 231279197 and 231279206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57819808 + ... + 57819811.

It is an arithmetic number, because the mean of its divisors is an integer number (86729715).

Almost surely, 2^231279238 is an apocalyptic number.

231279238 is a deficient number, since it is larger than the sum of its proper divisors (115639622).

231279238 is a wasteful number, since it uses less digits than its factorization.

231279238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115639621.

The product of its digits is 36288, while the sum is 37.

The square root of 231279238 is about 15207.8676348790. The cubic root of 231279238 is about 613.8263805456.

The spelling of 231279238 in words is "two hundred thirty-one million, two hundred seventy-nine thousand, two hundred thirty-eight".