36221639 has 2 divisors, whose sum is σ = 36221640. Its totient is φ = 36221638.

The previous prime is 36221629. The next prime is 36221641. The reversal of 36221639 is 93612263.

It is a strong prime.

It is an emirp because it is prime and its reverse (93612263) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36221639 - 2⁴ = 36221623 is a prime.

It is a Sophie Germain prime.

Together with 36221641, 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 (36221629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18110819 + 18110820.

It is an arithmetic number, because the mean of its divisors is an integer number (18110820).

Almost surely, 2^36221639 is an apocalyptic number.

36221639 is a deficient number, since it is larger than the sum of its proper divisors (1).

36221639 is an equidigital number, since it uses as much as digits as its factorization.

36221639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 32.

The square root of 36221639 is about 6018.4415756905. The cubic root of 36221639 is about 330.8689647843.

The spelling of 36221639 in words is "thirty-six million, two hundred twenty-one thousand, six hundred thirty-nine".