815340311 has 2 divisors, whose sum is σ = 815340312. Its totient is φ = 815340310.

The previous prime is 815340301. The next prime is 815340343. The reversal of 815340311 is 113043518.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-815340311 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (815340301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407670155 + 407670156.

It is an arithmetic number, because the mean of its divisors is an integer number (407670156).

Almost surely, 2^815340311 is an apocalyptic number.

815340311 is a deficient number, since it is larger than the sum of its proper divisors (1).

815340311 is an equidigital number, since it uses as much as digits as its factorization.

815340311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 815340311 is about 28554.1645123789. The cubic root of 815340311 is about 934.2138572024.

Adding to 815340311 its reverse (113043518), we get a palindrome (928383829).

The spelling of 815340311 in words is "eight hundred fifteen million, three hundred forty thousand, three hundred eleven".