172855445 has 16 divisors (see below), whose sum is σ = 249536640. Its totient is φ = 112290624.

The previous prime is 172855433. The next prime is 172855471. The reversal of 172855445 is 544558271.

It is a cyclic number.

It is not a de Polignac number, because 172855445 - 2⁶ = 172855381 is a prime.

It is a super-2 number, since 2×172855445² = 59758009732296050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129302 + ... + 130631.

It is an arithmetic number, because the mean of its divisors is an integer number (15596040).

Almost surely, 2^172855445 is an apocalyptic number.

It is an amenable number.

172855445 is a deficient number, since it is larger than the sum of its proper divisors (76681195).

172855445 is a wasteful number, since it uses less digits than its factorization.

172855445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259964.

The product of its digits is 224000, while the sum is 41.

The square root of 172855445 is about 13147.4501330106. The cubic root of 172855445 is about 557.0502260921.

The spelling of 172855445 in words is "one hundred seventy-two million, eight hundred fifty-five thousand, four hundred forty-five".