231956 has 12 divisors (see below), whose sum is σ = 410592. Its totient is φ = 114648.

The previous prime is 231947. The next prime is 231961. The reversal of 231956 is 659132.

It is a congruent number.

It is an unprimeable number.

231956 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 131 + ... + 693.

It is an arithmetic number, because the mean of its divisors is an integer number (34216).

2²³¹⁹⁵⁶ is an apocalyptic number.

It is an amenable number.

231956 is a deficient number, since it is larger than the sum of its proper divisors (178636).

231956 is a wasteful number, since it uses less digits than its factorization.

231956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670 (or 668 counting only the distinct ones).

The product of its digits is 1620, while the sum is 26.

The square root of 231956 is about 481.6181059719. The cubic root of 231956 is about 61.4424517296.

The spelling of 231956 in words is "two hundred thirty-one thousand, nine hundred fifty-six".