1315225911 has 4 divisors (see below), whose sum is σ = 1753634552. Its totient is φ = 876817272.

The previous prime is 1315225903. The next prime is 1315225913. The reversal of 1315225911 is 1195225131.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1315225911 - 2³ = 1315225903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315225913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219204316 + ... + 219204321.

It is an arithmetic number, because the mean of its divisors is an integer number (438408638).

Almost surely, 2^1315225911 is an apocalyptic number.

1315225911 is a deficient number, since it is larger than the sum of its proper divisors (438408641).

1315225911 is an equidigital number, since it uses as much as digits as its factorization.

1315225911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438408640.

The product of its digits is 2700, while the sum is 30.

The square root of 1315225911 is about 36266.0434980162. The cubic root of 1315225911 is about 1095.6372404755.

The spelling of 1315225911 in words is "one billion, three hundred fifteen million, two hundred twenty-five thousand, nine hundred eleven".