201217564819 has 2 divisors, whose sum is σ = 201217564820. Its totient is φ = 201217564818.

The previous prime is 201217564771. The next prime is 201217564841. The reversal of 201217564819 is 918465712102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201217564819 - 2⁹ = 201217564307 is a prime.

It is a super-2 number, since 2×201217564819² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201217574819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100608782409 + 100608782410.

It is an arithmetic number, because the mean of its divisors is an integer number (100608782410).

Almost surely, 2^201217564819 is an apocalyptic number.

201217564819 is a deficient number, since it is larger than the sum of its proper divisors (1).

201217564819 is an equidigital number, since it uses as much as digits as its factorization.

201217564819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 201217564819 in words is "two hundred one billion, two hundred seventeen million, five hundred sixty-four thousand, eight hundred nineteen".