36055561 has 4 divisors (see below), whose sum is σ = 36104832. Its totient is φ = 36006292.

The previous prime is 36055517. The next prime is 36055577. The reversal of 36055561 is 16555063.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16555063 = 7 ⋅2365009.

It is a cyclic number.

It is not a de Polignac number, because 36055561 - 2¹⁷ = 35924489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36055361) 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, 23521 + ... + 25006.

It is an arithmetic number, because the mean of its divisors is an integer number (9026208).

Almost surely, 2^36055561 is an apocalyptic number.

It is an amenable number.

36055561 is a deficient number, since it is larger than the sum of its proper divisors (49271).

36055561 is an equidigital number, since it uses as much as digits as its factorization.

36055561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49270.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 36055561 is about 6004.6282982380. The cubic root of 36055561 is about 330.3625064449.

The spelling of 36055561 in words is "thirty-six million, fifty-five thousand, five hundred sixty-one".