201312031 has 4 divisors (see below), whose sum is σ = 210064752. Its totient is φ = 192559312.

The previous prime is 201311993. The next prime is 201312061. The reversal of 201312031 is 130213102.

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

It is not a de Polignac number, because 201312031 - 2²⁵ = 167757599 is a prime.

It is a super-2 number, since 2×201312031² = 81053067650689922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201312061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4376326 + ... + 4376371.

It is an arithmetic number, because the mean of its divisors is an integer number (52516188).

Almost surely, 2^201312031 is an apocalyptic number.

201312031 is a deficient number, since it is larger than the sum of its proper divisors (8752721).

201312031 is an equidigital number, since it uses as much as digits as its factorization.

201312031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8752720.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 201312031 is about 14188.4470961413. The cubic root of 201312031 is about 586.0795620519.

Adding to 201312031 its reverse (130213102), we get a palindrome (331525133).

The spelling of 201312031 in words is "two hundred one million, three hundred twelve thousand, thirty-one".