345213331 has 16 divisors (see below), whose sum is σ = 360616960. Its totient is φ = 330220800.

The previous prime is 345213313. The next prime is 345213353. The reversal of 345213331 is 133312543.

It is a cyclic number.

It is not a de Polignac number, because 345213331 - 2¹¹ = 345211283 is a prime.

It is a super-2 number, since 2×345213331² = 238344487800231122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 345213296 and 345213305.

It is not an unprimeable number, because it can be changed into a prime (345213391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 512611 + ... + 513283.

It is an arithmetic number, because the mean of its divisors is an integer number (22538560).

Almost surely, 2^345213331 is an apocalyptic number.

345213331 is a deficient number, since it is larger than the sum of its proper divisors (15403629).

345213331 is a wasteful number, since it uses less digits than its factorization.

345213331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946.

The product of its digits is 3240, while the sum is 25.

The square root of 345213331 is about 18579.9174110113. The cubic root of 345213331 is about 701.5024402872.

Adding to 345213331 its reverse (133312543), we get a palindrome (478525874).

It can be divided in two parts, 3452133 and 31, that added together give a square (3452164 = 1858²).

The spelling of 345213331 in words is "three hundred forty-five million, two hundred thirteen thousand, three hundred thirty-one".