231349278 has 8 divisors (see below), whose sum is σ = 462698568. Its totient is φ = 77116424.

The previous prime is 231349231. The next prime is 231349289. The reversal of 231349278 is 872943132.

231349278 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

231349278 is an admirable number.

It is a super-2 number, since 2×231349278² = 107044976862242568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19279101 + ... + 19279112.

It is an arithmetic number, because the mean of its divisors is an integer number (57837321).

Almost surely, 2^231349278 is an apocalyptic number.

231349278 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231349278 is a wasteful number, since it uses less digits than its factorization.

231349278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38558218.

The product of its digits is 72576, while the sum is 39.

The square root of 231349278 is about 15210.1702160101. The cubic root of 231349278 is about 613.8883374840. Note that the first 3 decimals are identical.

The spelling of 231349278 in words is "two hundred thirty-one million, three hundred forty-nine thousand, two hundred seventy-eight".