221672477265847 has 2 divisors, whose sum is σ = 221672477265848. Its totient is φ = 221672477265846.

The previous prime is 221672477265823. The next prime is 221672477265851. The reversal of 221672477265847 is 748562774276122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221672477265847 - 2⁷ = 221672477265719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221672477265047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110836238632923 + 110836238632924.

It is an arithmetic number, because the mean of its divisors is an integer number (110836238632924).

Almost surely, 2^{221672477265847} is an apocalyptic number.

221672477265847 is a deficient number, since it is larger than the sum of its proper divisors (1).

221672477265847 is an equidigital number, since it uses as much as digits as its factorization.

221672477265847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 885104640, while the sum is 70.

The spelling of 221672477265847 in words is "two hundred twenty-one trillion, six hundred seventy-two billion, four hundred seventy-seven million, two hundred sixty-five thousand, eight hundred forty-seven".