1313223505 has 16 divisors (see below), whose sum is σ = 1719886464. Its totient is φ = 954650880.

The previous prime is 1313223491. The next prime is 1313223521. The reversal of 1313223505 is 5053223131.

It is not a de Polignac number, because 1313223505 - 2⁷ = 1313223377 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 1313223505.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178612 + ... + 185818.

It is an arithmetic number, because the mean of its divisors is an integer number (107492904).

Almost surely, 2^1313223505 is an apocalyptic number.

It is an amenable number.

1313223505 is a deficient number, since it is larger than the sum of its proper divisors (406662959).

1313223505 is a wasteful number, since it uses less digits than its factorization.

1313223505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10536.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 1313223505 is about 36238.4258074216. The cubic root of 1313223505 is about 1095.0809292228.

Adding to 1313223505 its reverse (5053223131), we get a palindrome (6366446636).

The spelling of 1313223505 in words is "one billion, three hundred thirteen million, two hundred twenty-three thousand, five hundred five".