3313201621 has 4 divisors (see below), whose sum is σ = 3508095852. Its totient is φ = 3118307392.

The previous prime is 3313201603. The next prime is 3313201651. The reversal of 3313201621 is 1261023133.

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 1506526596 + 1806675025 = 38814^2 + 42505^2 .

It is a cyclic number.

It is not a de Polignac number, because 3313201621 - 2¹⁵ = 3313168853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3313201592 and 3313201601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3313201651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97447090 + ... + 97447123.

It is an arithmetic number, because the mean of its divisors is an integer number (877023963).

Almost surely, 2^3313201621 is an apocalyptic number.

It is an amenable number.

3313201621 is a deficient number, since it is larger than the sum of its proper divisors (194894231).

3313201621 is a wasteful number, since it uses less digits than its factorization.

3313201621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194894230.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 3313201621 is about 57560.4171371264. The cubic root of 3313201621 is about 1490.7882292502.

Adding to 3313201621 its reverse (1261023133), we get a palindrome (4574224754).

The spelling of 3313201621 in words is "three billion, three hundred thirteen million, two hundred one thousand, six hundred twenty-one".