231101986 has 8 divisors (see below), whose sum is σ = 358606620. Its totient is φ = 111566448.

The previous prime is 231101971. The next prime is 231101989. The reversal of 231101986 is 689101132.

It can be written as a sum of positive squares in 2 ways, for example, as 215649225 + 15452761 = 14685^2 + 3931^2 .

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 (231101989) 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 3 ways as a sum of consecutive naturals, for example, 1992201 + ... + 1992316.

Almost surely, 2^231101986 is an apocalyptic number.

231101986 is a deficient number, since it is larger than the sum of its proper divisors (127504634).

231101986 is a wasteful number, since it uses less digits than its factorization.

231101986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3984548.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 231101986 is about 15202.0388764139. The cubic root of 231101986 is about 613.6695286500.

The spelling of 231101986 in words is "two hundred thirty-one million, one hundred one thousand, nine hundred eighty-six".