172057755 has 32 divisors (see below), whose sum is σ = 281304576. Its totient is φ = 89782784.

The previous prime is 172057751. The next prime is 172057757. The reversal of 172057755 is 557750271.

It is a cyclic number.

It is not a de Polignac number, because 172057755 - 2² = 172057751 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172057751) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 140074 + ... + 141296.

It is an arithmetic number, because the mean of its divisors is an integer number (8790768).

Almost surely, 2^172057755 is an apocalyptic number.

172057755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

172057755 is a deficient number, since it is larger than the sum of its proper divisors (109246821).

172057755 is a wasteful number, since it uses less digits than its factorization.

172057755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1427.

The product of its (nonzero) digits is 85750, while the sum is 39.

The square root of 172057755 is about 13117.0787525272. The cubic root of 172057755 is about 556.1920163437.

The spelling of 172057755 in words is "one hundred seventy-two million, fifty-seven thousand, seven hundred fifty-five".