201331213 has 4 divisors (see below), whose sum is σ = 210084768. Its totient is φ = 192577660.

The previous prime is 201331199. The next prime is 201331217. The reversal of 201331213 is 312133102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201331213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201331217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4376743 + ... + 4376788.

It is an arithmetic number, because the mean of its divisors is an integer number (52521192).

Almost surely, 2^201331213 is an apocalyptic number.

201331213 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

201331213 is a deficient number, since it is larger than the sum of its proper divisors (8753555).

201331213 is an equidigital number, since it uses as much as digits as its factorization.

201331213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8753554.

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

The square root of 201331213 is about 14189.1230525357. The cubic root of 201331213 is about 586.0981763080.

Adding to 201331213 its reverse (312133102), we get a palindrome (513464315).

The spelling of 201331213 in words is "two hundred one million, three hundred thirty-one thousand, two hundred thirteen".