47216557 has 4 divisors (see below), whose sum is σ = 47267676. Its totient is φ = 47165440.

The previous prime is 47216549. The next prime is 47216573. The reversal of 47216557 is 75561274.

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 42068196 + 5148361 = 6486^2 + 2269^2 .

It is a cyclic number.

It is not a de Polignac number, because 47216557 - 2³ = 47216549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47216527) 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, 24148 + ... + 26029.

It is an arithmetic number, because the mean of its divisors is an integer number (11816919).

Almost surely, 2^47216557 is an apocalyptic number.

It is an amenable number.

47216557 is a deficient number, since it is larger than the sum of its proper divisors (51119).

47216557 is an equidigital number, since it uses as much as digits as its factorization.

47216557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51118.

The product of its digits is 58800, while the sum is 37.

The square root of 47216557 is about 6871.4304915352. The cubic root of 47216557 is about 361.4360259631.

The spelling of 47216557 in words is "forty-seven million, two hundred sixteen thousand, five hundred fifty-seven".