36213631 has 2 divisors, whose sum is σ = 36213632. Its totient is φ = 36213630.

The previous prime is 36213629. The next prime is 36213637. The reversal of 36213631 is 13631263.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 36213631 - 2¹ = 36213629 is a prime.

It is a super-2 number, since 2×36213631² = 2622854140408322, which contains 22 as substring.

Together with 36213629, it forms a pair of twin primes.

It is equal to p_2216491 and since 36213631 and 2216491 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 36213596 and 36213605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36213637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18106815 + 18106816.

It is an arithmetic number, because the mean of its divisors is an integer number (18106816).

Almost surely, 2^36213631 is an apocalyptic number.

36213631 is a deficient number, since it is larger than the sum of its proper divisors (1).

36213631 is an equidigital number, since it uses as much as digits as its factorization.

36213631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 25.

The square root of 36213631 is about 6017.7762504101. The cubic root of 36213631 is about 330.8445797848.

Adding to 36213631 its reverse (13631263), we get a palindrome (49844894).

The spelling of 36213631 in words is "thirty-six million, two hundred thirteen thousand, six hundred thirty-one".