36143561 has 4 divisors (see below), whose sum is σ = 37120452. Its totient is φ = 35166672.

The previous prime is 36143543. The next prime is 36143563. The reversal of 36143561 is 16534163.

It is a happy number.

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 29767936 + 6375625 = 5456^2 + 2525^2 .

It is a cyclic number.

It is not a de Polignac number, because 36143561 - 2¹⁰ = 36142537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36143563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 488390 + ... + 488463.

It is an arithmetic number, because the mean of its divisors is an integer number (9280113).

Almost surely, 2^36143561 is an apocalyptic number.

It is an amenable number.

36143561 is a deficient number, since it is larger than the sum of its proper divisors (976891).

36143561 is an equidigital number, since it uses as much as digits as its factorization.

36143561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976890.

The product of its digits is 6480, while the sum is 29.

The square root of 36143561 is about 6011.9515134439. The cubic root of 36143561 is about 330.6310575372.

The spelling of 36143561 in words is "thirty-six million, one hundred forty-three thousand, five hundred sixty-one".