221165403615043 has 2 divisors, whose sum is σ = 221165403615044. Its totient is φ = 221165403615042.

The previous prime is 221165403614899. The next prime is 221165403615047. The reversal of 221165403615043 is 340516304561122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221165403615043 - 2³⁷ = 221027964661571 is a prime.

It is not a weakly prime, because it can be changed into another prime (221165403615047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110582701807521 + 110582701807522.

It is an arithmetic number, because the mean of its divisors is an integer number (110582701807522).

Almost surely, 2^{221165403615043} is an apocalyptic number.

221165403615043 is a deficient number, since it is larger than the sum of its proper divisors (1).

221165403615043 is an equidigital number, since it uses as much as digits as its factorization.

221165403615043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 221165403615043 in words is "two hundred twenty-one trillion, one hundred sixty-five billion, four hundred three million, six hundred fifteen thousand, forty-three".