231278332 has 6 divisors (see below), whose sum is σ = 404737088. Its totient is φ = 115639164.

The previous prime is 231278293. The next prime is 231278401. The reversal of 231278332 is 233872132.

It is a junction number, because it is equal to n+sod(n) for n = 231278294 and 231278303.

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, 28909788 + ... + 28909795.

Almost surely, 2^231278332 is an apocalyptic number.

It is an amenable number.

231278332 is a deficient number, since it is larger than the sum of its proper divisors (173458756).

231278332 is a wasteful number, since it uses less digits than its factorization.

231278332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57819587 (or 57819585 counting only the distinct ones).

The product of its digits is 12096, while the sum is 31.

The square root of 231278332 is about 15207.8378476363. The cubic root of 231278332 is about 613.8255790218.

The spelling of 231278332 in words is "two hundred thirty-one million, two hundred seventy-eight thousand, three hundred thirty-two".