1318215601 has 4 divisors (see below), whose sum is σ = 1324840000. Its totient is φ = 1311591204.

The previous prime is 1318215599. The next prime is 1318215623. The reversal of 1318215601 is 1065128131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1065128131 = 1741 ⋅611791.

It is a cyclic number.

It is not a de Polignac number, because 1318215601 - 2¹ = 1318215599 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1318215601.

It is not an unprimeable number, because it can be changed into a prime (1318215631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3311901 + ... + 3312298.

It is an arithmetic number, because the mean of its divisors is an integer number (331210000).

Almost surely, 2^1318215601 is an apocalyptic number.

It is an amenable number.

1318215601 is a deficient number, since it is larger than the sum of its proper divisors (6624399).

1318215601 is an equidigital number, since it uses as much as digits as its factorization.

1318215601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6624398.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1318215601 is about 36307.2389613972. The cubic root of 1318215601 is about 1096.4667904482.

The spelling of 1318215601 in words is "one billion, three hundred eighteen million, two hundred fifteen thousand, six hundred one".