36147281 has 4 divisors (see below), whose sum is σ = 37028964. Its totient is φ = 35265600.

The previous prime is 36147269. The next prime is 36147289. The reversal of 36147281 is 18274163.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4326400 + 31820881 = 2080^2 + 5641^2 .

It is a cyclic number.

It is not a de Polignac number, because 36147281 - 2⁶ = 36147217 is a prime.

It is a super-2 number, since 2×36147281² = 2613251847385922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36147289) 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, 440780 + ... + 440861.

It is an arithmetic number, because the mean of its divisors is an integer number (9257241).

Almost surely, 2^36147281 is an apocalyptic number.

It is an amenable number.

36147281 is a deficient number, since it is larger than the sum of its proper divisors (881683).

36147281 is an equidigital number, since it uses as much as digits as its factorization.

36147281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881682.

The product of its digits is 8064, while the sum is 32.

The square root of 36147281 is about 6012.2608892163. The cubic root of 36147281 is about 330.6424003168.

The spelling of 36147281 in words is "thirty-six million, one hundred forty-seven thousand, two hundred eighty-one".