3531631 has 4 divisors (see below), whose sum is σ = 3739392. Its totient is φ = 3323872.

The previous prime is 3531623. The next prime is 3531659. The reversal of 3531631 is 1361353.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1361353 = 7 ⋅194479.

It is a cyclic number.

It is not a de Polignac number, because 3531631 - 2³ = 3531623 is a prime.

It is a super-2 number, since 2×3531631² = 24944835040322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3531601) 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, 103855 + ... + 103888.

It is an arithmetic number, because the mean of its divisors is an integer number (934848).

Almost surely, 2^3531631 is an apocalyptic number.

3531631 is a deficient number, since it is larger than the sum of its proper divisors (207761).

3531631 is a wasteful number, since it uses less digits than its factorization.

3531631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207760.

The product of its digits is 810, while the sum is 22.

The square root of 3531631 is about 1879.2634195344. The cubic root of 3531631 is about 152.2854602150.

Adding to 3531631 its reverse (1361353), we get a palindrome (4892984).

The spelling of 3531631 in words is "three million, five hundred thirty-one thousand, six hundred thirty-one".