231228857 has 8 divisors (see below), whose sum is σ = 236060040. Its totient is φ = 226431360.

The previous prime is 231228827. The next prime is 231228869. The reversal of 231228857 is 758822132.

231228857 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 82973881 + 148254976 = 9109^2 + 12176^2 .

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 231228857 - 2⁶ = 231228793 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231228857.

It is not an unprimeable number, because it can be changed into a prime (231228827) 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, 5693 + ... + 22245.

It is an arithmetic number, because the mean of its divisors is an integer number (29507505).

Almost surely, 2^231228857 is an apocalyptic number.

It is an amenable number.

231228857 is a deficient number, since it is larger than the sum of its proper divisors (4831183).

231228857 is a wasteful number, since it uses less digits than its factorization.

231228857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16843.

The product of its digits is 53760, while the sum is 38.

The square root of 231228857 is about 15206.2111322972. The cubic root of 231228857 is about 613.7818060982.

The spelling of 231228857 in words is "two hundred thirty-one million, two hundred twenty-eight thousand, eight hundred fifty-seven".