172130278 has 8 divisors (see below), whose sum is σ = 259224840. Its totient is φ = 85722000.

The previous prime is 172130269. The next prime is 172130323. The reversal of 172130278 is 872031271.

172130278 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170943 + ... + 171946.

It is an arithmetic number, because the mean of its divisors is an integer number (32403105).

Almost surely, 2^172130278 is an apocalyptic number.

172130278 is a deficient number, since it is larger than the sum of its proper divisors (87094562).

172130278 is a wasteful number, since it uses less digits than its factorization.

172130278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343142.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 172130278 is about 13119.8429106449. The cubic root of 172130278 is about 556.2701510522.

The spelling of 172130278 in words is "one hundred seventy-two million, one hundred thirty thousand, two hundred seventy-eight".