231281086 has 4 divisors (see below), whose sum is σ = 346921632. Its totient is φ = 115640542.

The previous prime is 231281081. The next prime is 231281093. The reversal of 231281086 is 680182132.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231281081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57820270 + ... + 57820273.

It is an arithmetic number, because the mean of its divisors is an integer number (86730408).

Almost surely, 2^231281086 is an apocalyptic number.

231281086 is a deficient number, since it is larger than the sum of its proper divisors (115640546).

231281086 is a wasteful number, since it uses less digits than its factorization.

231281086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115640545.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 231281086 is about 15207.9283927825. The cubic root of 231281086 is about 613.8280154353.

The spelling of 231281086 in words is "two hundred thirty-one million, two hundred eighty-one thousand, eighty-six".