3553581 has 4 divisors (see below), whose sum is σ = 4738112. Its totient is φ = 2369052.

The previous prime is 3553579. The next prime is 3553601. The reversal of 3553581 is 1853553.

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 not a de Polignac number, because 3553581 - 2¹ = 3553579 is a prime.

It is a super-2 number, since 2×3553581² = 25255875847122, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3553531) 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, 592261 + ... + 592266.

It is an arithmetic number, because the mean of its divisors is an integer number (1184528).

Almost surely, 2^3553581 is an apocalyptic number.

It is an amenable number.

3553581 is a deficient number, since it is larger than the sum of its proper divisors (1184531).

3553581 is a wasteful number, since it uses less digits than its factorization.

3553581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184530.

The product of its digits is 9000, while the sum is 30.

The square root of 3553581 is about 1885.0944273431. The cubic root of 3553581 is about 152.6003066686.

The spelling of 3553581 in words is "three million, five hundred fifty-three thousand, five hundred eighty-one".