201231331 has 8 divisors (see below), whose sum is σ = 232089440. Its totient is φ = 170900928.

The previous prime is 201231307. The next prime is 201231341. The reversal of 201231331 is 133132102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201231331 is a prime.

It is a super-2 number, since 2×201231331² = 80988097152063122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201231341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131106 + ... + 132631.

It is an arithmetic number, because the mean of its divisors is an integer number (29011180).

Almost surely, 2^201231331 is an apocalyptic number.

201231331 is a deficient number, since it is larger than the sum of its proper divisors (30858109).

201231331 is a wasteful number, since it uses less digits than its factorization.

201231331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263853.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 201231331 is about 14185.6029480597. The cubic root of 201231331 is about 586.0012376356.

Adding to 201231331 its reverse (133132102), we get a palindrome (334363433).

The spelling of 201231331 in words is "two hundred one million, two hundred thirty-one thousand, three hundred thirty-one".