172220555 has 8 divisors (see below), whose sum is σ = 222562032. Its totient is φ = 127178208.

The previous prime is 172220539. The next prime is 172220563. The reversal of 172220555 is 555022271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172220555 - 2⁴ = 172220539 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1324709 + ... + 1324838.

It is an arithmetic number, because the mean of its divisors is an integer number (27820254).

Almost surely, 2^172220555 is an apocalyptic number.

172220555 is a deficient number, since it is larger than the sum of its proper divisors (50341477).

172220555 is a wasteful number, since it uses less digits than its factorization.

172220555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2649565.

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 172220555 is about 13123.2829353024. The cubic root of 172220555 is about 556.3673828780.

The spelling of 172220555 in words is "one hundred seventy-two million, two hundred twenty thousand, five hundred fifty-five".