172155027 has 16 divisors (see below), whose sum is σ = 250698240. Its totient is φ = 104215200.

The previous prime is 172154963. The next prime is 172155037. The reversal of 172155027 is 720551271.

It is not a de Polignac number, because 172155027 - 2⁶ = 172154963 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172154985 and 172155003.

It is not an unprimeable number, because it can be changed into a prime (172155037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31777 + ... + 36797.

It is an arithmetic number, because the mean of its divisors is an integer number (15668640).

Almost surely, 2^172155027 is an apocalyptic number.

172155027 is a deficient number, since it is larger than the sum of its proper divisors (78543213).

172155027 is a wasteful number, since it uses less digits than its factorization.

172155027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6074.

The product of its (nonzero) digits is 4900, while the sum is 30.

The square root of 172155027 is about 13120.7860663910. The cubic root of 172155027 is about 556.2968100657.

The spelling of 172155027 in words is "one hundred seventy-two million, one hundred fifty-five thousand, twenty-seven".