231281078 has 48 divisors (see below), whose sum is σ = 416145600. Its totient is φ = 96074496.

The previous prime is 231281033. The next prime is 231281081. The reversal of 231281078 is 870182132.

231281078 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 686126 + ... + 686462.

It is an arithmetic number, because the mean of its divisors is an integer number (8669700).

Almost surely, 2^231281078 is an apocalyptic number.

231281078 is a deficient number, since it is larger than the sum of its proper divisors (184864522).

231281078 is a wasteful number, since it uses less digits than its factorization.

231281078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549 (or 542 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 231281078 is about 15207.9281297618. The cubic root of 231281078 is about 613.8280083579.

The spelling of 231281078 in words is "two hundred thirty-one million, two hundred eighty-one thousand, seventy-eight".