47215173 has 4 divisors (see below), whose sum is σ = 62953568. Its totient is φ = 31476780.

The previous prime is 47215169. The next prime is 47215183. The reversal of 47215173 is 37151274.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 47215173 - 2² = 47215169 is a prime.

It is a super-2 number, since 2×47215173² = 4458545122839858, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47215173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47215153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7869193 + ... + 7869198.

It is an arithmetic number, because the mean of its divisors is an integer number (15738392).

Almost surely, 2^47215173 is an apocalyptic number.

It is an amenable number.

47215173 is a deficient number, since it is larger than the sum of its proper divisors (15738395).

47215173 is a wasteful number, since it uses less digits than its factorization.

47215173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15738394.

The product of its digits is 5880, while the sum is 30.

The square root of 47215173 is about 6871.3297839647. The cubic root of 47215173 is about 361.4324944876.

The spelling of 47215173 in words is "forty-seven million, two hundred fifteen thousand, one hundred seventy-three".