36631 has 4 divisors (see below), whose sum is σ = 41872. Its totient is φ = 31392.

The previous prime is 36629. The next prime is 36637. The reversal of 36631 is 13663.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13663 = 13 ⋅1051.

It is a cyclic number.

It is not a de Polignac number, because 36631 - 2¹ = 36629 is a prime.

It is a super-2 number, since 2×36631² = 2683660322, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a nialpdrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 36599 and 36608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36637) 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, 2610 + ... + 2623.

It is an arithmetic number, because the mean of its divisors is an integer number (10468).

2³⁶⁶³¹ is an apocalyptic number.

36631 is the 111-st hex number.

36631 is a deficient number, since it is larger than the sum of its proper divisors (5241).

36631 is an equidigital number, since it uses as much as digits as its factorization.

36631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5240.

The product of its digits is 324, while the sum is 19.

The square root of 36631 is about 191.3922673464. The cubic root of 36631 is about 33.2110743527.

The spelling of 36631 in words is "thirty-six thousand, six hundred thirty-one".