231278894 has 16 divisors (see below), whose sum is σ = 432521856. Its totient is φ = 90108600.

The previous prime is 231278891. The next prime is 231278917. The reversal of 231278894 is 498872132.

It is a super-3 number, since 3×231278894³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231278891) 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 7 ways as a sum of consecutive naturals, for example, 750752 + ... + 751059.

It is an arithmetic number, because the mean of its divisors is an integer number (27032616).

Almost surely, 2^231278894 is an apocalyptic number.

231278894 is a deficient number, since it is larger than the sum of its proper divisors (201242962).

231278894 is a wasteful number, since it uses less digits than its factorization.

231278894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501831.

The product of its digits is 193536, while the sum is 44.

The square root of 231278894 is about 15207.8563249394. The cubic root of 231278894 is about 613.8260762145.

The spelling of 231278894 in words is "two hundred thirty-one million, two hundred seventy-eight thousand, eight hundred ninety-four".