2313149581 has 4 divisors (see below), whose sum is σ = 2315940700. Its totient is φ = 2310358464.

The previous prime is 2313149551. The next prime is 2313149593. The reversal of 2313149581 is 1859413132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 745781481 + 1567368100 = 27309^2 + 39590^2 .

It is a cyclic number.

It is not a de Polignac number, because 2313149581 - 2⁵ = 2313149549 is a prime.

It is a super-2 number, since 2×2313149581² = 10701321968160951122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2313149581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2313149551) 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 3 ways as a sum of consecutive naturals, for example, 1394316 + ... + 1395973.

It is an arithmetic number, because the mean of its divisors is an integer number (578985175).

Almost surely, 2^2313149581 is an apocalyptic number.

It is an amenable number.

2313149581 is a deficient number, since it is larger than the sum of its proper divisors (2791119).

2313149581 is an equidigital number, since it uses as much as digits as its factorization.

2313149581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2791118.

The product of its digits is 25920, while the sum is 37.

The square root of 2313149581 is about 48095.2137015733. The cubic root of 2313149581 is about 1322.5169266097.

The spelling of 2313149581 in words is "two billion, three hundred thirteen million, one hundred forty-nine thousand, five hundred eighty-one".