65021563 has 2 divisors, whose sum is σ = 65021564. Its totient is φ = 65021562.

The previous prime is 65021521. The next prime is 65021569. The reversal of 65021563 is 36512056.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65021563 - 2⁹ = 65021051 is a prime.

It is not a weakly prime, because it can be changed into another prime (65021569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32510781 + 32510782.

It is an arithmetic number, because the mean of its divisors is an integer number (32510782).

Almost surely, 2^65021563 is an apocalyptic number.

65021563 is a deficient number, since it is larger than the sum of its proper divisors (1).

65021563 is an equidigital number, since it uses as much as digits as its factorization.

65021563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 65021563 is about 8063.5949179011. The cubic root of 65021563 is about 402.1170319226.

The spelling of 65021563 in words is "sixty-five million, twenty-one thousand, five hundred sixty-three".