231870867 has 12 divisors (see below), whose sum is σ = 316932504. Its totient is φ = 150700480.

The previous prime is 231870839. The next prime is 231870887. The reversal of 231870867 is 768078132.

It is not a de Polignac number, because 231870867 - 2¹² = 231866771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231870827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 168193 + ... + 169565.

It is an arithmetic number, because the mean of its divisors is an integer number (26411042).

Almost surely, 2^231870867 is an apocalyptic number.

231870867 is a deficient number, since it is larger than the sum of its proper divisors (85061637).

231870867 is an frugal number, since it uses more digits than its factorization.

231870867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2790 (or 1417 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 231870867 is about 15227.3066233001. The cubic root of 231870867 is about 614.3493389531.

The spelling of 231870867 in words is "two hundred thirty-one million, eight hundred seventy thousand, eight hundred sixty-seven".