231013332 has 36 divisors (see below), whose sum is σ = 637037856. Its totient is φ = 70003920.

The previous prime is 231013327. The next prime is 231013351. The reversal of 231013332 is 233310132.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

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 11 ways as a sum of consecutive naturals, for example, 291288 + ... + 292079.

It is an arithmetic number, because the mean of its divisors is an integer number (17695496).

Almost surely, 2^231013332 is an apocalyptic number.

231013332 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

231013332 is an abundant number, since it is smaller than the sum of its proper divisors (406024524).

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

231013332 is a wasteful number, since it uses less digits than its factorization.

231013332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583388 (or 583383 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 231013332 is about 15199.1227378425. The cubic root of 231013332 is about 613.5910478350.

Adding to 231013332 its reverse (233310132), we get a palindrome (464323464).

The spelling of 231013332 in words is "two hundred thirty-one million, thirteen thousand, three hundred thirty-two".