3531391 has 4 divisors (see below), whose sum is σ = 3626872. Its totient is φ = 3435912.

The previous prime is 3531389. The next prime is 3531403. The reversal of 3531391 is 1931353.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3531391 - 2¹ = 3531389 is a prime.

It is a Duffinian number.

3531391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3531331) 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, 47685 + ... + 47758.

It is an arithmetic number, because the mean of its divisors is an integer number (906718).

Almost surely, 2^3531391 is an apocalyptic number.

3531391 is a deficient number, since it is larger than the sum of its proper divisors (95481).

3531391 is an equidigital number, since it uses as much as digits as its factorization.

3531391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95480.

The product of its digits is 1215, while the sum is 25.

The square root of 3531391 is about 1879.1995636441. The cubic root of 3531391 is about 152.2820105022.

The spelling of 3531391 in words is "three million, five hundred thirty-one thousand, three hundred ninety-one".