231283861 has 4 divisors (see below), whose sum is σ = 244888812. Its totient is φ = 217678912.

The previous prime is 231283847. The next prime is 231283889. The reversal of 231283861 is 168382132.

It is a happy number.

231283861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 80460900 + 150822961 = 8970^2 + 12281^2 .

It is a cyclic number.

It is not a de Polignac number, because 231283861 - 2¹⁵ = 231251093 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 (231283841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6802450 + ... + 6802483.

It is an arithmetic number, because the mean of its divisors is an integer number (61222203).

Almost surely, 2^231283861 is an apocalyptic number.

It is an amenable number.

231283861 is a deficient number, since it is larger than the sum of its proper divisors (13604951).

231283861 is a wasteful number, since it uses less digits than its factorization.

231283861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13604950.

The product of its digits is 13824, while the sum is 34.

The square root of 231283861 is about 15208.0196278148. The cubic root of 231283861 is about 613.8304704075.

The spelling of 231283861 in words is "two hundred thirty-one million, two hundred eighty-three thousand, eight hundred sixty-one".