345402205 has 4 divisors (see below), whose sum is σ = 414482652. Its totient is φ = 276321760.

The previous prime is 345402199. The next prime is 345402223. The reversal of 345402205 is 502204543.

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

It can be written as a sum of positive squares in 2 ways, for example, as 198556281 + 146845924 = 14091^2 + 12118^2 .

It is not a de Polignac number, because 345402205 - 2¹⁷ = 345271133 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 345402205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34540216 + ... + 34540225.

It is an arithmetic number, because the mean of its divisors is an integer number (103620663).

Almost surely, 2^345402205 is an apocalyptic number.

It is an amenable number.

345402205 is a deficient number, since it is larger than the sum of its proper divisors (69080447).

345402205 is an equidigital number, since it uses as much as digits as its factorization.

345402205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69080446.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 345402205 is about 18584.9994619317. Note that the first 3 decimals coincide. The cubic root of 345402205 is about 701.6303528981.

Adding to 345402205 its reverse (502204543), we get a palindrome (847606748).

The spelling of 345402205 in words is "three hundred forty-five million, four hundred two thousand, two hundred five".