173225281 has 4 divisors (see below), whose sum is σ = 174193200. Its totient is φ = 172257364.

The previous prime is 173225267. The next prime is 173225309. The reversal of 173225281 is 182522371.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 182522371 = 3727 ⋅48973.

It is a cyclic number.

It is not a de Polignac number, because 173225281 - 2¹³ = 173217089 is a prime.

It is a super-2 number, since 2×173225281² = 60013995955057922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (173295281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 483691 + ... + 484048.

It is an arithmetic number, because the mean of its divisors is an integer number (43548300).

Almost surely, 2^173225281 is an apocalyptic number.

It is an amenable number.

173225281 is a deficient number, since it is larger than the sum of its proper divisors (967919).

173225281 is an equidigital number, since it uses as much as digits as its factorization.

173225281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967918.

The product of its digits is 6720, while the sum is 31.

The square root of 173225281 is about 13161.5075504290. The cubic root of 173225281 is about 557.4472253931.

The spelling of 173225281 in words is "one hundred seventy-three million, two hundred twenty-five thousand, two hundred eighty-one".