36538561 has 2 divisors, whose sum is σ = 36538562.
Its totient is φ = 36538560.
The previous prime is 36538487. The next prime is 36538597. The reversal of 36538561 is 16583563.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 21762225 + 14776336 = 4665^2 + 3844^2
It is a cyclic number.
It is not a de Polignac number, because 36538561 - 219 = 36014273 is a prime.
It is a self number, because there is not a number n which added to its sum of digits gives 36538561.
It is not a weakly prime, because it can be changed into another prime (36536561) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18269280 + 18269281.
It is an arithmetic number, because the mean of its divisors is an integer number (18269281).
Almost surely, 236538561 is an apocalyptic number.
It is an amenable number.
36538561 is a deficient number, since it is larger than the sum of its proper divisors (1).
36538561 is an equidigital number, since it uses as much as digits as its factorization.
36538561 is an evil number, because the sum of its binary digits is even.
The product of its digits is 64800, while the sum is 37.
The square root of 36538561 is about 6044.7134754263.
The cubic root of 36538561 is about 331.8311456884.
The spelling of 36538561 in words is "thirty-six million, five hundred thirty-eight thousand, five hundred sixty-one".