346221313 has 4 divisors (see below), whose sum is σ = 346557508. Its totient is φ = 345885120.

The previous prime is 346221311. The next prime is 346221383. The reversal of 346221313 is 313122643.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 313122643 = 17 ⋅18418979.

It can be written as a sum of positive squares in 2 ways, for example, as 258180624 + 88040689 = 16068^2 + 9383^2 .

It is a cyclic number.

It is not a de Polignac number, because 346221313 - 2¹ = 346221311 is a prime.

It is a super-3 number, since 3×346221313³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (346221311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166548 + ... + 168613.

It is an arithmetic number, because the mean of its divisors is an integer number (86639377).

Almost surely, 2^346221313 is an apocalyptic number.

It is an amenable number.

346221313 is a deficient number, since it is larger than the sum of its proper divisors (336195).

346221313 is a wasteful number, since it uses less digits than its factorization.

346221313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336194.

The product of its digits is 2592, while the sum is 25.

The square root of 346221313 is about 18607.0232170544. The cubic root of 346221313 is about 702.1845448157.

Adding to 346221313 its reverse (313122643), we get a palindrome (659343956).

The spelling of 346221313 in words is "three hundred forty-six million, two hundred twenty-one thousand, three hundred thirteen".