231088997 has 8 divisors (see below), whose sum is σ = 238459032. Its totient is φ = 223801600.

The previous prime is 231088993. The next prime is 231088999. The reversal of 231088997 is 799880132.

231088997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 8213956 + 222875041 = 2866^2 + 14929^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 231088997 - 2² = 231088993 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231088993) 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, 14954 + ... + 26187.

It is an arithmetic number, because the mean of its divisors is an integer number (29807379).

Almost surely, 2^231088997 is an apocalyptic number.

It is an amenable number.

231088997 is a deficient number, since it is larger than the sum of its proper divisors (7370035).

231088997 is a wasteful number, since it uses less digits than its factorization.

231088997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41319.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 231088997 is about 15201.6116579789. The cubic root of 231088997 is about 613.6580314131.

The spelling of 231088997 in words is "two hundred thirty-one million, eighty-eight thousand, nine hundred ninety-seven".