3553345021 has 12 divisors (see below), whose sum is σ = 3753726300. Its totient is φ = 3363167808.

The previous prime is 3553344989. The next prime is 3553345027. The reversal of 3553345021 is 1205433553.

It can be written as a sum of positive squares in 2 ways, for example, as 3075922521 + 477422500 = 55461^2 + 21850^2 .

It is not a de Polignac number, because 3553345021 - 2⁵ = 3553344989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3553345027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 439665 + ... + 447673.

It is an arithmetic number, because the mean of its divisors is an integer number (312810525).

Almost surely, 2^3553345021 is an apocalyptic number.

It is an amenable number.

3553345021 is a deficient number, since it is larger than the sum of its proper divisors (200381279).

3553345021 is a wasteful number, since it uses less digits than its factorization.

3553345021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9276 (or 9257 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 31.

The square root of 3553345021 is about 59609.9406223492. The cubic root of 3553345021 is about 1525.9692873664.

Adding to 3553345021 its reverse (1205433553), we get a palindrome (4758778574).

The spelling of 3553345021 in words is "three billion, five hundred fifty-three million, three hundred forty-five thousand, twenty-one".