221407345754447 has 2 divisors, whose sum is σ = 221407345754448. Its totient is φ = 221407345754446.

The previous prime is 221407345754423. The next prime is 221407345754461. The reversal of 221407345754447 is 744457543704122.

221407345754447 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221407345754447 - 2²⁸ = 221407077318991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221407345754417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110703672877223 + 110703672877224.

It is an arithmetic number, because the mean of its divisors is an integer number (110703672877224).

Almost surely, 2^{221407345754447} is an apocalyptic number.

221407345754447 is a deficient number, since it is larger than the sum of its proper divisors (1).

221407345754447 is an equidigital number, since it uses as much as digits as its factorization.

221407345754447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105369600, while the sum is 59.

The spelling of 221407345754447 in words is "two hundred twenty-one trillion, four hundred seven billion, three hundred forty-five million, seven hundred fifty-four thousand, four hundred forty-seven".