47220017 has 4 divisors (see below), whose sum is σ = 50852340. Its totient is φ = 43587696.

The previous prime is 47219941. The next prime is 47220023. The reversal of 47220017 is 71002274.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21169201 + 26050816 = 4601^2 + 5104^2 .

It is a cyclic number.

It is not a de Polignac number, because 47220017 - 2¹⁴ = 47203633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47219974 and 47220001.

It is not an unprimeable number, because it can be changed into a prime (47220077) 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, 1816142 + ... + 1816167.

It is an arithmetic number, because the mean of its divisors is an integer number (12713085).

Almost surely, 2^47220017 is an apocalyptic number.

It is an amenable number.

47220017 is a deficient number, since it is larger than the sum of its proper divisors (3632323).

47220017 is a wasteful number, since it uses less digits than its factorization.

47220017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3632322.

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 47220017 is about 6871.6822540045. The cubic root of 47220017 is about 361.4448543500. Note that the first 3 decimals are identical.

The spelling of 47220017 in words is "forty-seven million, two hundred twenty thousand, seventeen".