3345220405 has 4 divisors (see below), whose sum is σ = 4014264492. Its totient is φ = 2676176320.

The previous prime is 3345220399. The next prime is 3345220423. The reversal of 3345220405 is 5040225433.

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 1118701809 + 2226518596 = 33447^2 + 47186^2 .

It is a de Polignac number, because none of the positive numbers 2^k-3345220405 is a prime.

It is a super-2 number, since 2×3345220405² = 22380999116056728050, which contains 22 as substring.

It is a Duffinian number.

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, 334522036 + ... + 334522045.

It is an arithmetic number, because the mean of its divisors is an integer number (1003566123).

Almost surely, 2^3345220405 is an apocalyptic number.

It is an amenable number.

3345220405 is a deficient number, since it is larger than the sum of its proper divisors (669044087).

3345220405 is an equidigital number, since it uses as much as digits as its factorization.

3345220405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669044086.

The product of its (nonzero) digits is 14400, while the sum is 28.

The square root of 3345220405 is about 57837.8803639967. The cubic root of 3345220405 is about 1495.5751682254.

Adding to 3345220405 its reverse (5040225433), we get a palindrome (8385445838).

The spelling of 3345220405 in words is "three billion, three hundred forty-five million, two hundred twenty thousand, four hundred five".