3115813 has 2 divisors, whose sum is σ = 3115814. Its totient is φ = 3115812.

The previous prime is 3115799. The next prime is 3115831. The reversal of 3115813 is 3185113.

Together with next prime (3115831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2502724 + 613089 = 1582^2 + 783^2 .

It is a cyclic number.

It is not a de Polignac number, because 3115813 - 2⁵ = 3115781 is a prime.

3115813 is a lucky number.

It is equal to p₂₂₄₅₅₄ and since 3115813 and 224554 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3115873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1557906 + 1557907.

It is an arithmetic number, because the mean of its divisors is an integer number (1557907).

Almost surely, 2^3115813 is an apocalyptic number.

It is an amenable number.

3115813 is a deficient number, since it is larger than the sum of its proper divisors (1).

3115813 is an equidigital number, since it uses as much as digits as its factorization.

3115813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360, while the sum is 22.

The square root of 3115813 is about 1765.1665643786. The cubic root of 3115813 is about 146.0574772131.

The spelling of 3115813 in words is "three million, one hundred fifteen thousand, eight hundred thirteen".