172143147 has 16 divisors (see below), whose sum is σ = 256215168. Its totient is φ = 101902080.

The previous prime is 172143113. The next prime is 172143151. The reversal of 172143147 is 741341271.

It is not a de Polignac number, because 172143147 - 2⁸ = 172142891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172143107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59238 + ... + 62075.

It is an arithmetic number, because the mean of its divisors is an integer number (16013448).

Almost surely, 2^172143147 is an apocalyptic number.

172143147 is a deficient number, since it is larger than the sum of its proper divisors (84072021).

172143147 is a wasteful number, since it uses less digits than its factorization.

172143147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121370.

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

The square root of 172143147 is about 13120.3333418020. Note that the first 4 decimals coincide. The cubic root of 172143147 is about 556.2840135410.

The spelling of 172143147 in words is "one hundred seventy-two million, one hundred forty-three thousand, one hundred forty-seven".