231278234 has 32 divisors (see below), whose sum is σ = 401754816. Its totient is φ = 98686720.

The previous prime is 231278233. The next prime is 231278249. The reversal of 231278234 is 432872132.

It is a self number, because there is not a number n which added to its sum of digits gives 231278234.

It is not an unprimeable number, because it can be changed into a prime (231278233) 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, 243749 + ... + 244695.

It is an arithmetic number, because the mean of its divisors is an integer number (12554838).

Almost surely, 2^231278234 is an apocalyptic number.

231278234 is a deficient number, since it is larger than the sum of its proper divisors (170476582).

231278234 is a wasteful number, since it uses less digits than its factorization.

231278234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630.

The product of its digits is 16128, while the sum is 32.

The square root of 231278234 is about 15207.8346256132. The cubic root of 231278234 is about 613.8254923227.

The spelling of 231278234 in words is "two hundred thirty-one million, two hundred seventy-eight thousand, two hundred thirty-four".