3550381 has 4 divisors (see below), whose sum is σ = 3632992. Its totient is φ = 3467772.

The previous prime is 3550373. The next prime is 3550387. The reversal of 3550381 is 1830553.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1830553 = 43 ⋅42571.

It is a cyclic number.

It is not a de Polignac number, because 3550381 - 2³ = 3550373 is a prime.

It is a super-2 number, since 2×3550381² = 25210410490322, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3550387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41241 + ... + 41326.

It is an arithmetic number, because the mean of its divisors is an integer number (908248).

Almost surely, 2^3550381 is an apocalyptic number.

It is an amenable number.

3550381 is a deficient number, since it is larger than the sum of its proper divisors (82611).

3550381 is an equidigital number, since it uses as much as digits as its factorization.

3550381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82610.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 3550381 is about 1884.2454723310. The cubic root of 3550381 is about 152.5544873826.

The spelling of 3550381 in words is "three million, five hundred fifty thousand, three hundred eighty-one".