231497 has 4 divisors (see below), whose sum is σ = 264576. Its totient is φ = 198420.

The previous prime is 231493. The next prime is 231503. The reversal of 231497 is 794132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231497 - 2² = 231493 is a prime.

It is a super-2 number, since 2×231497² = 107181722018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16529 + ... + 16542.

It is an arithmetic number, because the mean of its divisors is an integer number (66144).

2²³¹⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

231497 is a deficient number, since it is larger than the sum of its proper divisors (33079).

231497 is an equidigital number, since it uses as much as digits as its factorization.

231497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33078.

The product of its digits is 1512, while the sum is 26.

The square root of 231497 is about 481.1413513719. The cubic root of 231497 is about 61.4018970437.

The spelling of 231497 in words is "two hundred thirty-one thousand, four hundred ninety-seven".