172220853 has 16 divisors (see below), whose sum is σ = 264439296. Its totient is φ = 97659120.

The previous prime is 172220837. The next prime is 172220911. The reversal of 172220853 is 358022271.

172220853 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 172220853 - 2⁴ = 172220837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172220853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172220813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28551 + ... + 34052.

It is an arithmetic number, because the mean of its divisors is an integer number (16527456).

Almost surely, 2^172220853 is an apocalyptic number.

It is an amenable number.

172220853 is a deficient number, since it is larger than the sum of its proper divisors (92218443).

172220853 is a wasteful number, since it uses less digits than its factorization.

172220853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62744.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 172220853 is about 13123.2942891638. The cubic root of 172220853 is about 556.3677037793.

The spelling of 172220853 in words is "one hundred seventy-two million, two hundred twenty thousand, eight hundred fifty-three".