331132231 has 4 divisors (see below), whose sum is σ = 331177000. Its totient is φ = 331087464.

The previous prime is 331132229. The next prime is 331132253. The reversal of 331132231 is 132231133.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 331132231 - 2¹ = 331132229 is a prime.

It is a super-2 number, since 2×331132231² = 219297108814074722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331132199 and 331132208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331132201) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 8361 + ... + 27058.

It is an arithmetic number, because the mean of its divisors is an integer number (82794250).

Almost surely, 2^331132231 is an apocalyptic number.

331132231 is a deficient number, since it is larger than the sum of its proper divisors (44769).

331132231 is an equidigital number, since it uses as much as digits as its factorization.

331132231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44768.

The product of its digits is 324, while the sum is 19.

The square root of 331132231 is about 18197.0390723326. The cubic root of 331132231 is about 691.8317436215.

Adding to 331132231 its reverse (132231133), we get a palindrome (463363364).

It can be divided in two parts, 33113 and 2231, that added together give a square (35344 = 188²).

The spelling of 331132231 in words is "three hundred thirty-one million, one hundred thirty-two thousand, two hundred thirty-one".