345311331 has 4 divisors (see below), whose sum is σ = 460415112. Its totient is φ = 230207552.

The previous prime is 345311279. The next prime is 345311347. The reversal of 345311331 is 133113543.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133113543 = 3 ⋅44371181.

It is a cyclic number.

It is not a de Polignac number, because 345311331 - 2¹³ = 345303139 is a prime.

It is a super-2 number, since 2×345311331² = 238479830633983122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (345311231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57551886 + ... + 57551891.

It is an arithmetic number, because the mean of its divisors is an integer number (115103778).

Almost surely, 2^345311331 is an apocalyptic number.

345311331 is a deficient number, since it is larger than the sum of its proper divisors (115103781).

345311331 is a wasteful number, since it uses less digits than its factorization.

345311331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115103780.

The product of its digits is 1620, while the sum is 24.

The square root of 345311331 is about 18582.5544799417. The cubic root of 345311331 is about 701.5688154130.

Adding to 345311331 its reverse (133113543), we get a palindrome (478424874).

The spelling of 345311331 in words is "three hundred forty-five million, three hundred eleven thousand, three hundred thirty-one".