3551218 has 16 divisors (see below), whose sum is σ = 5855040. Its totient is φ = 1602000.

The previous prime is 3551213. The next prime is 3551221. The reversal of 3551218 is 8121553.

It is a happy number.

It is a super-2 number, since 2×3551218² = 25222298567048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3551192 and 3551201.

It is not an unprimeable number, because it can be changed into a prime (3551213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2788 + ... + 3856.

It is an arithmetic number, because the mean of its divisors is an integer number (365940).

Almost surely, 2^3551218 is an apocalyptic number.

3551218 is a deficient number, since it is larger than the sum of its proper divisors (2303822).

3551218 is a wasteful number, since it uses less digits than its factorization.

3551218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233.

The product of its digits is 1200, while the sum is 25.

The square root of 3551218 is about 1884.4675640615. The cubic root of 3551218 is about 152.5664746476.

The spelling of 3551218 in words is "three million, five hundred fifty-one thousand, two hundred eighteen".