3281631 has 8 divisors (see below), whose sum is σ = 4477440. Its totient is φ = 2136792.

The previous prime is 3281627. The next prime is 3281657. The reversal of 3281631 is 1361823.

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

It is not a de Polignac number, because 3281631 - 2² = 3281627 is a prime.

It is a super-2 number, since 2×3281631² = 21538204040322, which contains 22 as substring.

It is an Ulam number.

3281631 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3281431) 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, 12591 + ... + 12848.

It is an arithmetic number, because the mean of its divisors is an integer number (559680).

Almost surely, 2^3281631 is an apocalyptic number.

3281631 is a deficient number, since it is larger than the sum of its proper divisors (1195809).

3281631 is a wasteful number, since it uses less digits than its factorization.

3281631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25485.

The product of its digits is 864, while the sum is 24.

The square root of 3281631 is about 1811.5272562123. The cubic root of 3281631 is about 148.6038000486.

The spelling of 3281631 in words is "three million, two hundred eighty-one thousand, six hundred thirty-one".