3405538221 has 4 divisors (see below), whose sum is σ = 4540717632. Its totient is φ = 2270358812.

The previous prime is 3405538219. The next prime is 3405538247. The reversal of 3405538221 is 1228355043.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3405538221 - 2¹ = 3405538219 is a prime.

It is a super-3 number, since 3×3405538221³ (a number of 30 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3405538021) 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, 567589701 + ... + 567589706.

It is an arithmetic number, because the mean of its divisors is an integer number (1135179408).

Almost surely, 2^3405538221 is an apocalyptic number.

It is an amenable number.

3405538221 is a deficient number, since it is larger than the sum of its proper divisors (1135179411).

3405538221 is a wasteful number, since it uses less digits than its factorization.

3405538221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135179410.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 3405538221 is about 58356.9894785535. The cubic root of 3405538221 is about 1504.5106035967.

The spelling of 3405538221 in words is "three billion, four hundred five million, five hundred thirty-eight thousand, two hundred twenty-one".