1315220371 has 2 divisors, whose sum is σ = 1315220372. Its totient is φ = 1315220370.

The previous prime is 1315220369. The next prime is 1315220377. The reversal of 1315220371 is 1730225131.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1315220371 - 2¹ = 1315220369 is a prime.

Together with 1315220369, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1315220377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657610185 + 657610186.

It is an arithmetic number, because the mean of its divisors is an integer number (657610186).

Almost surely, 2^1315220371 is an apocalyptic number.

1315220371 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315220371 is an equidigital number, since it uses as much as digits as its factorization.

1315220371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 1315220371 is about 36265.9671179468. The cubic root of 1315220371 is about 1095.6357021241.

The spelling of 1315220371 in words is "one billion, three hundred fifteen million, two hundred twenty thousand, three hundred seventy-one".