345731311 has 4 divisors (see below), whose sum is σ = 354163824. Its totient is φ = 337298800.

The previous prime is 345731303. The next prime is 345731317. The reversal of 345731311 is 113137543.

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

It is not a de Polignac number, because 345731311 - 2³ = 345731303 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 345731311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345731317) 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, 4216195 + ... + 4216276.

It is an arithmetic number, because the mean of its divisors is an integer number (88540956).

Almost surely, 2^345731311 is an apocalyptic number.

345731311 is a deficient number, since it is larger than the sum of its proper divisors (8432513).

345731311 is an equidigital number, since it uses as much as digits as its factorization.

345731311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8432512.

The product of its digits is 3780, while the sum is 28.

The square root of 345731311 is about 18593.8514299754. The cubic root of 345731311 is about 701.8531245497.

Adding to 345731311 its reverse (113137543), we get a palindrome (458868854).

The spelling of 345731311 in words is "three hundred forty-five million, seven hundred thirty-one thousand, three hundred eleven".