221700055523 has 2 divisors, whose sum is σ = 221700055524. Its totient is φ = 221700055522.

The previous prime is 221700055441. The next prime is 221700055553. The reversal of 221700055523 is 325550007122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221700055523 - 2¹⁴ = 221700039139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221700055523.

It is not a weakly prime, because it can be changed into another prime (221700055553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110850027761 + 110850027762.

It is an arithmetic number, because the mean of its divisors is an integer number (110850027762).

Almost surely, 2^221700055523 is an apocalyptic number.

221700055523 is a deficient number, since it is larger than the sum of its proper divisors (1).

221700055523 is an equidigital number, since it uses as much as digits as its factorization.

221700055523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21000, while the sum is 32.

The spelling of 221700055523 in words is "two hundred twenty-one billion, seven hundred million, fifty-five thousand, five hundred twenty-three".