36251621 has 6 divisors (see below), whose sum is σ = 42170310. Its totient is φ = 31072776.

The previous prime is 36251587. The next prime is 36251641. The reversal of 36251621 is 12615263.

36251621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 33189121 + 3062500 = 5761^2 + 1750^2 .

It is not a de Polignac number, because 36251621 - 2¹⁰ = 36250597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36251641) 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 in 5 ways as a sum of consecutive naturals, for example, 369866 + ... + 369963.

It is an arithmetic number, because the mean of its divisors is an integer number (7028385).

Almost surely, 2^36251621 is an apocalyptic number.

It is an amenable number.

36251621 is a deficient number, since it is larger than the sum of its proper divisors (5918689).

36251621 is an equidigital number, since it uses as much as digits as its factorization.

36251621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739843 (or 739836 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 36251621 is about 6020.9319046141. The cubic root of 36251621 is about 330.9602304638.

Adding to 36251621 its reverse (12615263), we get a palindrome (48866884).

The spelling of 36251621 in words is "thirty-six million, two hundred fifty-one thousand, six hundred twenty-one".