36221687 has 4 divisors (see below), whose sum is σ = 36235176. Its totient is φ = 36208200.

The previous prime is 36221677. The next prime is 36221719. The reversal of 36221687 is 78612263.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 36221687 - 2⁶ = 36221623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36221677) 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, 1193 + ... + 8594.

It is an arithmetic number, because the mean of its divisors is an integer number (9058794).

Almost surely, 2^36221687 is an apocalyptic number.

36221687 is a deficient number, since it is larger than the sum of its proper divisors (13489).

36221687 is an equidigital number, since it uses as much as digits as its factorization.

36221687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13488.

The product of its digits is 24192, while the sum is 35.

The square root of 36221687 is about 6018.4455634325. The cubic root of 36221687 is about 330.8691109373.

The spelling of 36221687 in words is "thirty-six million, two hundred twenty-one thousand, six hundred eighty-seven".