36855631 has 2 divisors, whose sum is σ = 36855632. Its totient is φ = 36855630.

The previous prime is 36855629. The next prime is 36855647. The reversal of 36855631 is 13655863.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 36855631 - 2¹ = 36855629 is a prime.

It is a super-2 number, since 2×36855631² = 2716675072816322, which contains 22 as substring.

Together with 36855629, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36855691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18427815 + 18427816.

It is an arithmetic number, because the mean of its divisors is an integer number (18427816).

Almost surely, 2^36855631 is an apocalyptic number.

36855631 is a deficient number, since it is larger than the sum of its proper divisors (1).

36855631 is an equidigital number, since it uses as much as digits as its factorization.

36855631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 37.

The square root of 36855631 is about 6070.8838730452. The cubic root of 36855631 is about 332.7882242765.

It can be divided in two parts, 3685 and 5631, that added together give a triangular number (9316 = T₁₃₆).

The spelling of 36855631 in words is "thirty-six million, eight hundred fifty-five thousand, six hundred thirty-one".