36517561 has 2 divisors, whose sum is σ = 36517562. Its totient is φ = 36517560.

The previous prime is 36517553. The next prime is 36517567. The reversal of 36517561 is 16571563.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33419961 + 3097600 = 5781^2 + 1760^2 .

It is a cyclic number.

It is not a de Polignac number, because 36517561 - 2³ = 36517553 is a prime.

It is a super-2 number, since 2×36517561² = 2667064522777442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (36517567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18258780 + 18258781.

It is an arithmetic number, because the mean of its divisors is an integer number (18258781).

Almost surely, 2^36517561 is an apocalyptic number.

It is an amenable number.

36517561 is a deficient number, since it is larger than the sum of its proper divisors (1).

36517561 is an equidigital number, since it uses as much as digits as its factorization.

36517561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18900, while the sum is 34.

The square root of 36517561 is about 6042.9761707291. The cubic root of 36517561 is about 331.7675618170.

The spelling of 36517561 in words is "thirty-six million, five hundred seventeen thousand, five hundred sixty-one".