231213986 has 8 divisors (see below), whose sum is σ = 361900224. Its totient is φ = 110580580.

The previous prime is 231213977. The next prime is 231213989. The reversal of 231213986 is 689312132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (231213989) 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, 2513150 + ... + 2513241.

It is an arithmetic number, because the mean of its divisors is an integer number (45237528).

Almost surely, 2^231213986 is an apocalyptic number.

231213986 is a deficient number, since it is larger than the sum of its proper divisors (130686238).

231213986 is a wasteful number, since it uses less digits than its factorization.

231213986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5026416.

The product of its digits is 15552, while the sum is 35.

The square root of 231213986 is about 15205.7221466131. The cubic root of 231213986 is about 613.7686477853.

The spelling of 231213986 in words is "two hundred thirty-one million, two hundred thirteen thousand, nine hundred eighty-six".