47216817 has 16 divisors (see below), whose sum is σ = 70061760. Its totient is φ = 31428000.

The previous prime is 47216801. The next prime is 47216821. The reversal of 47216817 is 71861274.

It is not a de Polignac number, because 47216817 - 2⁴ = 47216801 is a prime.

It is a super-2 number, since 2×47216817² = 4458855615222978, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (47216887) 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, 25317 + ... + 27117.

It is an arithmetic number, because the mean of its divisors is an integer number (4378860).

Almost surely, 2^47216817 is an apocalyptic number.

It is an amenable number.

47216817 is a deficient number, since it is larger than the sum of its proper divisors (22844943).

47216817 is a wasteful number, since it uses less digits than its factorization.

47216817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2781 (or 2775 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 47216817 is about 6871.4494104228. The cubic root of 47216817 is about 361.4366893829.

The spelling of 47216817 in words is "forty-seven million, two hundred sixteen thousand, eight hundred seventeen".