2031313109 has 4 divisors (see below), whose sum is σ = 2321500704. Its totient is φ = 1741125516.

The previous prime is 2031313073. The next prime is 2031313121. The reversal of 2031313109 is 9013131302.

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 not a de Polignac number, because 2031313109 - 2²⁴ = 2014535893 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 (2031313909) 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, 145093787 + ... + 145093800.

It is an arithmetic number, because the mean of its divisors is an integer number (580375176).

Almost surely, 2^2031313109 is an apocalyptic number.

It is an amenable number.

2031313109 is a deficient number, since it is larger than the sum of its proper divisors (290187595).

2031313109 is an equidigital number, since it uses as much as digits as its factorization.

2031313109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290187594.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 2031313109 is about 45070.0910693555. The cubic root of 2031313109 is about 1266.4623704295.

The spelling of 2031313109 in words is "two billion, thirty-one million, three hundred thirteen thousand, one hundred nine".