36881231 has 2 divisors, whose sum is σ = 36881232. Its totient is φ = 36881230.

The previous prime is 36881219. The next prime is 36881233. The reversal of 36881231 is 13218863.

It is a happy number.

36881231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 36881231 - 2¹⁴ = 36864847 is a prime.

It is a super-2 number, since 2×36881231² = 2720450400150722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 36881233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36881233) 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 as a sum of consecutive naturals, namely, 18440615 + 18440616.

It is an arithmetic number, because the mean of its divisors is an integer number (18440616).

Almost surely, 2^36881231 is an apocalyptic number.

36881231 is a deficient number, since it is larger than the sum of its proper divisors (1).

36881231 is an equidigital number, since it uses as much as digits as its factorization.

36881231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 32.

The square root of 36881231 is about 6072.9919314947. The cubic root of 36881231 is about 332.8652582470.

The spelling of 36881231 in words is "thirty-six million, eight hundred eighty-one thousand, two hundred thirty-one".