231180861 has 16 divisors (see below), whose sum is σ = 311086080. Its totient is φ = 152705280.

The previous prime is 231180839. The next prime is 231180863. The reversal of 231180861 is 168081132.

It is not a de Polignac number, because 231180861 - 2¹⁴ = 231164477 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231180863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178705 + ... + 179993.

It is an arithmetic number, because the mean of its divisors is an integer number (19442880).

Almost surely, 2^231180861 is an apocalyptic number.

It is an amenable number.

231180861 is a deficient number, since it is larger than the sum of its proper divisors (79905219).

231180861 is a wasteful number, since it uses less digits than its factorization.

231180861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1796.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 231180861 is about 15204.6328794878. The cubic root of 231180861 is about 613.7393357502.

The spelling of 231180861 in words is "two hundred thirty-one million, one hundred eighty thousand, eight hundred sixty-one".