815323151 has 2 divisors, whose sum is σ = 815323152. Its totient is φ = 815323150.

The previous prime is 815323097. The next prime is 815323259. The reversal of 815323151 is 151323518.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 815323151 - 2⁶ = 815323087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (815323051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407661575 + 407661576.

It is an arithmetic number, because the mean of its divisors is an integer number (407661576).

Almost surely, 2^815323151 is an apocalyptic number.

815323151 is a deficient number, since it is larger than the sum of its proper divisors (1).

815323151 is an equidigital number, since it uses as much as digits as its factorization.

815323151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 29.

The square root of 815323151 is about 28553.8640292343. The cubic root of 815323151 is about 934.2073032020.

Adding to 815323151 its reverse (151323518), we get a palindrome (966646669).

The spelling of 815323151 in words is "eight hundred fifteen million, three hundred twenty-three thousand, one hundred fifty-one".