1315505201 has 4 divisors (see below), whose sum is σ = 1316129892. Its totient is φ = 1314880512.

The previous prime is 1315505183. The next prime is 1315505249. The reversal of 1315505201 is 1025055131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1025055131 = 1087 ⋅943013.

It can be written as a sum of positive squares in 2 ways, for example, as 530104576 + 785400625 = 23024^2 + 28025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1315505201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1315505251) 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, 309176 + ... + 313401.

It is an arithmetic number, because the mean of its divisors is an integer number (329032473).

Almost surely, 2^1315505201 is an apocalyptic number.

It is an amenable number.

1315505201 is a deficient number, since it is larger than the sum of its proper divisors (624691).

1315505201 is an equidigital number, since it uses as much as digits as its factorization.

1315505201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624690.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 1315505201 is about 36269.8938652983. The cubic root of 1315505201 is about 1095.7147883363.

The spelling of 1315505201 in words is "one billion, three hundred fifteen million, five hundred five thousand, two hundred one".