61135517 has 2 divisors, whose sum is σ = 61135518. Its totient is φ = 61135516.

The previous prime is 61135513. The next prime is 61135531. The reversal of 61135517 is 71553116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38800441 + 22335076 = 6229^2 + 4726^2 .

It is a cyclic number.

It is not a de Polignac number, because 61135517 - 2² = 61135513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61135517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61135513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30567758 + 30567759.

It is an arithmetic number, because the mean of its divisors is an integer number (30567759).

Almost surely, 2^61135517 is an apocalyptic number.

It is an amenable number.

61135517 is a deficient number, since it is larger than the sum of its proper divisors (1).

61135517 is an equidigital number, since it uses as much as digits as its factorization.

61135517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3150, while the sum is 29.

The square root of 61135517 is about 7818.9204497808. The cubic root of 61135517 is about 393.9410121522.

The spelling of 61135517 in words is "sixty-one million, one hundred thirty-five thousand, five hundred seventeen".