222761728171897 has 2 divisors, whose sum is σ = 222761728171898. Its totient is φ = 222761728171896.

The previous prime is 222761728171831. The next prime is 222761728171933. The reversal of 222761728171897 is 798171827167222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204168548027536 + 18593180144361 = 14288756^2 + 4311981^2 .

It is a cyclic number.

It is not a de Polignac number, because 222761728171897 - 2¹⁵ = 222761728139129 is a prime.

It is not a weakly prime, because it can be changed into another prime (222761728171097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111380864085948 + 111380864085949.

It is an arithmetic number, because the mean of its divisors is an integer number (111380864085949).

Almost surely, 2^{222761728171897} is an apocalyptic number.

It is an amenable number.

222761728171897 is a deficient number, since it is larger than the sum of its proper divisors (1).

222761728171897 is an equidigital number, since it uses as much as digits as its factorization.

222761728171897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 132765696, while the sum is 70.

The spelling of 222761728171897 in words is "two hundred twenty-two trillion, seven hundred sixty-one billion, seven hundred twenty-eight million, one hundred seventy-one thousand, eight hundred ninety-seven".