1315431223 has 2 divisors, whose sum is σ = 1315431224. Its totient is φ = 1315431222.

The previous prime is 1315431179. The next prime is 1315431233. The reversal of 1315431223 is 3221345131.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1315431223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1315431233) 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 as a sum of consecutive naturals, namely, 657715611 + 657715612.

It is an arithmetic number, because the mean of its divisors is an integer number (657715612).

Almost surely, 2^1315431223 is an apocalyptic number.

1315431223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315431223 is an equidigital number, since it uses as much as digits as its factorization.

1315431223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 25.

The square root of 1315431223 is about 36268.8740244304. The cubic root of 1315431223 is about 1095.6942486207.

Adding to 1315431223 its reverse (3221345131), we get a palindrome (4536776354).

The spelling of 1315431223 in words is "one billion, three hundred fifteen million, four hundred thirty-one thousand, two hundred twenty-three".