47212173 has 8 divisors (see below), whose sum is σ = 69944000. Its totient is φ = 31474764.

The previous prime is 47212133. The next prime is 47212183. The reversal of 47212173 is 37121274.

It is a happy number.

47212173 is a `hidden beast` number, since 472 + 121 + 73 = 666.

It is not a de Polignac number, because 47212173 - 2²² = 43017869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1748599 = 47212173 / (4 + 7 + 2 + 1 + 2 + 1 + 7 + 3).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47212103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 874273 + ... + 874326.

It is an arithmetic number, because the mean of its divisors is an integer number (8743000).

Almost surely, 2^47212173 is an apocalyptic number.

It is an amenable number.

47212173 is a deficient number, since it is larger than the sum of its proper divisors (22731827).

47212173 is a wasteful number, since it uses less digits than its factorization.

47212173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1748608 (or 1748602 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 47212173 is about 6871.1114821403. Note that the first 3 decimals coincide. The cubic root of 47212173 is about 361.4248393181.

The spelling of 47212173 in words is "forty-seven million, two hundred twelve thousand, one hundred seventy-three".