3551556 has 48 divisors (see below), whose sum is σ = 8980160. Its totient is φ = 1088640.

The previous prime is 3551551. The next prime is 3551563. The reversal of 3551556 is 6551553.

It is a super-2 number, since 2×3551556² = 25227100042272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3551551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8226 + ... + 8646.

Almost surely, 2^3551556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3551556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4490080).

3551556 is an abundant number, since it is smaller than the sum of its proper divisors (5428604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3551556 is a wasteful number, since it uses less digits than its factorization.

3551556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484 (or 482 counting only the distinct ones).

The product of its digits is 11250, while the sum is 30.

The square root of 3551556 is about 1884.5572424312. The cubic root of 3551556 is about 152.5713148491.

The spelling of 3551556 in words is "three million, five hundred fifty-one thousand, five hundred fifty-six".