43631 has 8 divisors (see below), whose sum is σ = 52224. Its totient is φ = 35640.

The previous prime is 43627. The next prime is 43633. The reversal of 43631 is 13634.

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 43631 - 2² = 43627 is a prime.

It is a super-2 number, since 2×43631² = 3807328322, 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 (43633) 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, 26 + ... + 296.

It is an arithmetic number, because the mean of its divisors is an integer number (6528).

2⁴³⁶³¹ is an apocalyptic number.

43631 is a deficient number, since it is larger than the sum of its proper divisors (8593).

43631 is a wasteful number, since it uses less digits than its factorization.

43631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301.

The product of its digits is 216, while the sum is 17.

The square root of 43631 is about 208.8803485252. The cubic root of 43631 is about 35.2045168963.

The spelling of 43631 in words is "forty-three thousand, six hundred thirty-one".