3551643 has 12 divisors (see below), whose sum is σ = 5149768. Its totient is φ = 2358720.

The previous prime is 3551641. The next prime is 3551663. The reversal of 3551643 is 3461553.

It is not a de Polignac number, because 3551643 - 2¹ = 3551641 is a prime.

It is a super-2 number, since 2×3551643² = 25228335998898, which contains 22 as substring.

It is a d-powerful number, because it can be written as 3² + 5⁵ + 5⁹ + 1 + 6² + 4⁵ + 3¹³ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3551641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2448 + ... + 3618.

Almost surely, 2^3551643 is an apocalyptic number.

3551643 is a deficient number, since it is larger than the sum of its proper divisors (1598125).

3551643 is a wasteful number, since it uses less digits than its factorization.

3551643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514 (or 1511 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 3551643 is about 1884.5803246346. The cubic root of 3551643 is about 152.5725606501.

The spelling of 3551643 in words is "three million, five hundred fifty-one thousand, six hundred forty-three".