3531581 has 8 divisors (see below), whose sum is σ = 3706560. Its totient is φ = 3358432.

The previous prime is 3531571. The next prime is 3531599. The reversal of 3531581 is 1851353.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3531581 - 2¹⁸ = 3269437 is a prime.

It is a super-2 number, since 2×3531581² = 24944128719122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3531581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3531571) 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, 5030 + ... + 5688.

It is an arithmetic number, because the mean of its divisors is an integer number (463320).

Almost surely, 2^3531581 is an apocalyptic number.

It is an amenable number.

3531581 is a deficient number, since it is larger than the sum of its proper divisors (174979).

3531581 is a wasteful number, since it uses less digits than its factorization.

3531581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915.

The product of its digits is 1800, while the sum is 26.

The square root of 3531581 is about 1879.2501164028. The cubic root of 3531581 is about 152.2847415377.

The spelling of 3531581 in words is "three million, five hundred thirty-one thousand, five hundred eighty-one".