311513345 has 32 divisors (see below), whose sum is σ = 440584704. Its totient is φ = 208454400.

The previous prime is 311513329. The next prime is 311513393. The reversal of 311513345 is 543315113.

It is not a de Polignac number, because 311513345 - 2⁴ = 311513329 is a prime.

It is a super-2 number, since 2×311513345² = 194081128226178050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 330575 + ... + 331515.

It is an arithmetic number, because the mean of its divisors is an integer number (13768272).

Almost surely, 2^311513345 is an apocalyptic number.

It is an amenable number.

311513345 is a deficient number, since it is larger than the sum of its proper divisors (129071359).

311513345 is a wasteful number, since it uses less digits than its factorization.

311513345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1433.

The product of its digits is 2700, while the sum is 26.

The square root of 311513345 is about 17649.7406496526. The cubic root of 311513345 is about 677.8894662061.

Adding to 311513345 its reverse (543315113), we get a palindrome (854828458).

The spelling of 311513345 in words is "three hundred eleven million, five hundred thirteen thousand, three hundred forty-five".