172271385 has 96 divisors (see below), whose sum is σ = 369532800. Its totient is φ = 72990720.

The previous prime is 172271383. The next prime is 172271399. The reversal of 172271385 is 583172271.

172271385 is a `hidden beast` number, since 1 + 7 + 2 + 271 + 385 = 666.

It is not a de Polignac number, because 172271385 - 2¹ = 172271383 is a prime.

Together with 197261415 it forms an amicable pair .

It is not an unprimeable number, because it can be changed into a prime (172271383) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 121561 + ... + 122969.

It is an arithmetic number, because the mean of its divisors is an integer number (3849300).

Almost surely, 2^172271385 is an apocalyptic number.

172271385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172271385 is an abundant number, since it is smaller than the sum of its proper divisors (197261415).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172271385 is a wasteful number, since it uses less digits than its factorization.

172271385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1463 (or 1460 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 172271385 is about 13125.2194267372. The cubic root of 172271385 is about 556.4221138058.

The spelling of 172271385 in words is "one hundred seventy-two million, two hundred seventy-one thousand, three hundred eighty-five".