42221536519693 has 2 divisors, whose sum is σ = 42221536519694. Its totient is φ = 42221536519692.

The previous prime is 42221536519661. The next prime is 42221536519697. The reversal of 42221536519693 is 39691563512224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33230636218404 + 8990900301289 = 5764602^2 + 2998483^2 .

It is a cyclic number.

It is not a de Polignac number, because 42221536519693 - 2⁵ = 42221536519661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42221536519697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21110768259846 + 21110768259847.

It is an arithmetic number, because the mean of its divisors is an integer number (21110768259847).

Almost surely, 2^{42221536519693} is an apocalyptic number.

It is an amenable number.

42221536519693 is a deficient number, since it is larger than the sum of its proper divisors (1).

42221536519693 is an equidigital number, since it uses as much as digits as its factorization.

42221536519693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20995200, while the sum is 58.

The spelling of 42221536519693 in words is "forty-two trillion, two hundred twenty-one billion, five hundred thirty-six million, five hundred nineteen thousand, six hundred ninety-three".