231151857 has 16 divisors (see below), whose sum is σ = 312560640. Its totient is φ = 151938000.

The previous prime is 231151849. The next prime is 231151859. The reversal of 231151857 is 758151132.

It is not a de Polignac number, because 231151857 - 2³ = 231151849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231151859) 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, 61132 + ... + 64802.

It is an arithmetic number, because the mean of its divisors is an integer number (19535040).

Almost surely, 2^231151857 is an apocalyptic number.

It is an amenable number.

231151857 is a deficient number, since it is larger than the sum of its proper divisors (81408783).

231151857 is a wasteful number, since it uses less digits than its factorization.

231151857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3964.

The product of its digits is 8400, while the sum is 33.

The square root of 231151857 is about 15203.6790613325. The cubic root of 231151857 is about 613.7136680542.

The spelling of 231151857 in words is "two hundred thirty-one million, one hundred fifty-one thousand, eight hundred fifty-seven".