61565303 has 2 divisors, whose sum is σ = 61565304. Its totient is φ = 61565302.

The previous prime is 61565297. The next prime is 61565311. The reversal of 61565303 is 30356516.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61565303 - 2²⁰ = 60516727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61565363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30782651 + 30782652.

It is an arithmetic number, because the mean of its divisors is an integer number (30782652).

Almost surely, 2^61565303 is an apocalyptic number.

61565303 is a deficient number, since it is larger than the sum of its proper divisors (1).

61565303 is an equidigital number, since it uses as much as digits as its factorization.

61565303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 29.

The square root of 61565303 is about 7846.3560332169. The cubic root of 61565303 is about 394.8619995414.

The spelling of 61565303 in words is "sixty-one million, five hundred sixty-five thousand, three hundred three".