36043721 has 4 divisors (see below), whose sum is σ = 41192832. Its totient is φ = 30894612.

The previous prime is 36043687. The next prime is 36043727. The reversal of 36043721 is 12734063.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 36043721 - 2²² = 31849417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36043727) 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, 2574545 + ... + 2574558.

It is an arithmetic number, because the mean of its divisors is an integer number (10298208).

Almost surely, 2^36043721 is an apocalyptic number.

It is an amenable number.

36043721 is a deficient number, since it is larger than the sum of its proper divisors (5149111).

36043721 is an equidigital number, since it uses as much as digits as its factorization.

36043721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5149110.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 36043721 is about 6003.6423111308. The cubic root of 36043721 is about 330.3263407772.

Adding to 36043721 its reverse (12734063), we get a palindrome (48777784).

The spelling of 36043721 in words is "thirty-six million, forty-three thousand, seven hundred twenty-one".