3631431 has 4 divisors (see below), whose sum is σ = 4841912. Its totient is φ = 2420952.

The previous prime is 3631427. The next prime is 3631457. The reversal of 3631431 is 1341363.

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

It is not a de Polignac number, because 3631431 - 2² = 3631427 is a prime.

It is a super-2 number, since 2×3631431² = 26374582215522, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3631398 and 3631407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3631031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 605236 + ... + 605241.

It is an arithmetic number, because the mean of its divisors is an integer number (1210478).

Almost surely, 2^3631431 is an apocalyptic number.

3631431 is a deficient number, since it is larger than the sum of its proper divisors (1210481).

3631431 is a wasteful number, since it uses less digits than its factorization.

3631431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1210480.

The product of its digits is 648, while the sum is 21.

The square root of 3631431 is about 1905.6313914291. The cubic root of 3631431 is about 153.7066293162.

Adding to 3631431 its reverse (1341363), we get a palindrome (4972794).

The spelling of 3631431 in words is "three million, six hundred thirty-one thousand, four hundred thirty-one".