1315647226 has 4 divisors (see below), whose sum is σ = 1973470842. Its totient is φ = 657823612.

The previous prime is 1315647211. The next prime is 1315647227. The reversal of 1315647226 is 6227465131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6227465131 = 157 ⋅39665383.

It can be written as a sum of positive squares in only one way, i.e., 992187001 + 323460225 = 31499^2 + 17985^2 .

It is not an unprimeable number, because it can be changed into a prime (1315647227) 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, 328911805 + ... + 328911808.

Almost surely, 2^1315647226 is an apocalyptic number.

1315647226 is a deficient number, since it is larger than the sum of its proper divisors (657823616).

1315647226 is an equidigital number, since it uses as much as digits as its factorization.

1315647226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657823615.

The product of its digits is 60480, while the sum is 37.

The square root of 1315647226 is about 36271.8517034904. The cubic root of 1315647226 is about 1095.7542188894.

The spelling of 1315647226 in words is "one billion, three hundred fifteen million, six hundred forty-seven thousand, two hundred twenty-six".