2170223365997 has 2 divisors, whose sum is σ = 2170223365998. Its totient is φ = 2170223365996.

The previous prime is 2170223365957. The next prime is 2170223366063. The reversal of 2170223365997 is 7995633220712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1613138768836 + 557084597161 = 1270094^2 + 746381^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2170223365997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2170223365957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1085111682998 + 1085111682999.

It is an arithmetic number, because the mean of its divisors is an integer number (1085111682999).

Almost surely, 2^{2170223365997} is an apocalyptic number.

It is an amenable number.

2170223365997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2170223365997 is an equidigital number, since it uses as much as digits as its factorization.

2170223365997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8573040, while the sum is 56.

The spelling of 2170223365997 in words is "two trillion, one hundred seventy billion, two hundred twenty-three million, three hundred sixty-five thousand, nine hundred ninety-seven".