231278869 has 8 divisors (see below), whose sum is σ = 246470400. Its totient is φ = 216515376.

The previous prime is 231278867. The next prime is 231278881. The reversal of 231278869 is 968872132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231278869 - 2¹ = 231278867 is a prime.

It is a super-2 number, since 2×231278869² = 106979830491838322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231278867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105894 + ... + 108055.

It is an arithmetic number, because the mean of its divisors is an integer number (30808800).

Almost surely, 2^231278869 is an apocalyptic number.

It is an amenable number.

231278869 is a deficient number, since it is larger than the sum of its proper divisors (15191531).

231278869 is a wasteful number, since it uses less digits than its factorization.

231278869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214019.

The product of its digits is 290304, while the sum is 46.

The square root of 231278869 is about 15207.8555029958. The cubic root of 231278869 is about 613.8260540974.

The spelling of 231278869 in words is "two hundred thirty-one million, two hundred seventy-eight thousand, eight hundred sixty-nine".