313840505 has 16 divisors (see below), whose sum is σ = 416479104. Its totient is φ = 225118080.

The previous prime is 313840489. The next prime is 313840601. The reversal of 313840505 is 505048313.

It is not a de Polignac number, because 313840505 - 2⁴ = 313840489 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 35069 + ... + 43098.

It is an arithmetic number, because the mean of its divisors is an integer number (26029944).

Almost surely, 2^313840505 is an apocalyptic number.

It is an amenable number.

313840505 is a deficient number, since it is larger than the sum of its proper divisors (102638599).

313840505 is a wasteful number, since it uses less digits than its factorization.

313840505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78256.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 313840505 is about 17715.5441632483. The cubic root of 313840505 is about 679.5733374525.

Adding to 313840505 its reverse (505048313), we get a palindrome (818888818).

The spelling of 313840505 in words is "three hundred thirteen million, eight hundred forty thousand, five hundred five".