47171217 has 4 divisors (see below), whose sum is σ = 62894960. Its totient is φ = 31447476.

The previous prime is 47171207. The next prime is 47171231. The reversal of 47171217 is 71217174.

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 47171217 - 2⁶ = 47171153 is a prime.

It is a super-2 number, since 2×47171217² = 4450247426522178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47171207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7861867 + ... + 7861872.

It is an arithmetic number, because the mean of its divisors is an integer number (15723740).

Almost surely, 2^47171217 is an apocalyptic number.

It is an amenable number.

47171217 is a deficient number, since it is larger than the sum of its proper divisors (15723743).

47171217 is a wasteful number, since it uses less digits than its factorization.

47171217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15723742.

The product of its digits is 2744, while the sum is 30.

The square root of 47171217 is about 6868.1305316658. The cubic root of 47171217 is about 361.3202984961.

The spelling of 47171217 in words is "forty-seven million, one hundred seventy-one thousand, two hundred seventeen".