3450320221 has 4 divisors (see below), whose sum is σ = 3653280252. Its totient is φ = 3247360192.

The previous prime is 3450320213. The next prime is 3450320233. The reversal of 3450320221 is 1220230543.

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 1060479225 + 2389840996 = 32565^2 + 48886^2 .

It is a cyclic number.

It is not a de Polignac number, because 3450320221 - 2³ = 3450320213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3450320192 and 3450320201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3450320261) 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, 101479990 + ... + 101480023.

It is an arithmetic number, because the mean of its divisors is an integer number (913320063).

Almost surely, 2^3450320221 is an apocalyptic number.

It is an amenable number.

3450320221 is a deficient number, since it is larger than the sum of its proper divisors (202960031).

3450320221 is a wasteful number, since it uses less digits than its factorization.

3450320221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202960030.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 3450320221 is about 58739.4264612790. The cubic root of 3450320221 is about 1511.0765565253.

Adding to 3450320221 its reverse (1220230543), we get a palindrome (4670550764).

The spelling of 3450320221 in words is "three billion, four hundred fifty million, three hundred twenty thousand, two hundred twenty-one".