1315220351 has 4 divisors (see below), whose sum is σ = 1392586272. Its totient is φ = 1237854432.

The previous prime is 1315220323. The next prime is 1315220369. The reversal of 1315220351 is 1530225131.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1315220351 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 (1315220371) 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 in 3 ways as a sum of consecutive naturals, for example, 38682935 + ... + 38682968.

It is an arithmetic number, because the mean of its divisors is an integer number (348146568).

Almost surely, 2^1315220351 is an apocalyptic number.

1315220351 is a deficient number, since it is larger than the sum of its proper divisors (77365921).

1315220351 is an equidigital number, since it uses as much as digits as its factorization.

1315220351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77365920.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1315220351 is about 36265.9668422062. The cubic root of 1315220351 is about 1095.6356965705.

Adding to 1315220351 its reverse (1530225131), we get a palindrome (2845445482).

The spelling of 1315220351 in words is "one billion, three hundred fifteen million, two hundred twenty thousand, three hundred fifty-one".