172147143 has 12 divisors (see below), whose sum is σ = 267003960. Its totient is φ = 98369712.

The previous prime is 172147141. The next prime is 172147147. The reversal of 172147143 is 341741271.

It is not a de Polignac number, because 172147143 - 2¹ = 172147141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172147143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172147141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 585388 + ... + 585681.

It is an arithmetic number, because the mean of its divisors is an integer number (22250330).

Almost surely, 2^172147143 is an apocalyptic number.

172147143 is a deficient number, since it is larger than the sum of its proper divisors (94856817).

172147143 is a wasteful number, since it uses less digits than its factorization.

172147143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171086 (or 1171079 counting only the distinct ones).

The product of its digits is 4704, while the sum is 30.

The square root of 172147143 is about 13120.4856236345. The cubic root of 172147143 is about 556.2883178923.

The spelling of 172147143 in words is "one hundred seventy-two million, one hundred forty-seven thousand, one hundred forty-three".