61565201 has 2 divisors, whose sum is σ = 61565202. Its totient is φ = 61565200.

The previous prime is 61565117. The next prime is 61565209. The reversal of 61565201 is 10256516.

61565201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53640976 + 7924225 = 7324^2 + 2815^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61565201 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61565209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30782600 + 30782601.

It is an arithmetic number, because the mean of its divisors is an integer number (30782601).

Almost surely, 2^61565201 is an apocalyptic number.

It is an amenable number.

61565201 is a deficient number, since it is larger than the sum of its proper divisors (1).

61565201 is an equidigital number, since it uses as much as digits as its factorization.

61565201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 61565201 is about 7846.3495333817. The cubic root of 61565201 is about 394.8617814751.

The spelling of 61565201 in words is "sixty-one million, five hundred sixty-five thousand, two hundred one".