173222681 has 4 divisors (see below), whose sum is σ = 173326692. Its totient is φ = 173118672.

The previous prime is 173222669. The next prime is 173222689. The reversal of 173222681 is 186222371.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 110670400 + 62552281 = 10520^2 + 7909^2 .

It is a cyclic number.

It is not a de Polignac number, because 173222681 - 2⁶ = 173222617 is a prime.

It is a super-2 number, since 2×173222681² = 60012194425655522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (173222689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49466 + ... + 52851.

It is an arithmetic number, because the mean of its divisors is an integer number (43331673).

Almost surely, 2^173222681 is an apocalyptic number.

It is an amenable number.

173222681 is a deficient number, since it is larger than the sum of its proper divisors (104011).

173222681 is a wasteful number, since it uses less digits than its factorization.

173222681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104010.

The product of its digits is 8064, while the sum is 32.

The square root of 173222681 is about 13161.4087771788. The cubic root of 173222681 is about 557.4444364044. Note that the first 4 decimals are identical.

The spelling of 173222681 in words is "one hundred seventy-three million, two hundred twenty-two thousand, six hundred eighty-one".