231111132 has 24 divisors (see below), whose sum is σ = 616296576. Its totient is φ = 66031728.

The previous prime is 231111109. The next prime is 231111149.

It is a happy number.

231111132 is nontrivially palindromic in base 10.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1375578 + ... + 1375745.

It is an arithmetic number, because the mean of its divisors is an integer number (25679024).

Almost surely, 2^231111132 is an apocalyptic number.

It is an amenable number.

231111132 is an abundant number, since it is smaller than the sum of its proper divisors (385185444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231111132 is a wasteful number, since it uses less digits than its factorization.

231111132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2751337 (or 2751335 counting only the distinct ones).

The product of its digits is 36, while the sum is 15.

The square root of 231111132 is about 15202.3396883506. The cubic root of 231111132 is about 613.6776239901.

The spelling of 231111132 in words is "two hundred thirty-one million, one hundred eleven thousand, one hundred thirty-two".