36181513 has 2 divisors, whose sum is σ = 36181514. Its totient is φ = 36181512.

The previous prime is 36181499. The next prime is 36181543. The reversal of 36181513 is 31518163.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31674384 + 4507129 = 5628^2 + 2123^2 .

It is an emirp because it is prime and its reverse (31518163) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36181513 - 2²¹ = 34084361 is a prime.

It is not a weakly prime, because it can be changed into another prime (36181543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18090756 + 18090757.

It is an arithmetic number, because the mean of its divisors is an integer number (18090757).

Almost surely, 2^36181513 is an apocalyptic number.

It is an amenable number.

36181513 is a deficient number, since it is larger than the sum of its proper divisors (1).

36181513 is an equidigital number, since it uses as much as digits as its factorization.

36181513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 28.

The square root of 36181513 is about 6015.1070647163. The cubic root of 36181513 is about 330.7467417709.

Adding to 36181513 its reverse (31518163), we get a palindrome (67699676).

The spelling of 36181513 in words is "thirty-six million, one hundred eighty-one thousand, five hundred thirteen".