47218785 has 16 divisors (see below), whose sum is σ = 77158656. Its totient is φ = 24647168.

The previous prime is 47218753. The next prime is 47218789. The reversal of 47218785 is 58781274.

It is a cyclic number.

It is not a de Polignac number, because 47218785 - 2⁵ = 47218753 is a prime.

It is a super-2 number, since 2×47218785² = 4459227313752450, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (47218789) 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, 32784 + ... + 34193.

It is an arithmetic number, because the mean of its divisors is an integer number (4822416).

Almost surely, 2^47218785 is an apocalyptic number.

It is an amenable number.

47218785 is a deficient number, since it is larger than the sum of its proper divisors (29939871).

47218785 is a wasteful number, since it uses less digits than its factorization.

47218785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67032.

The product of its digits is 125440, while the sum is 42.

The square root of 47218785 is about 6871.5926101596. The cubic root of 47218785 is about 361.4417108814.

The spelling of 47218785 in words is "forty-seven million, two hundred eighteen thousand, seven hundred eighty-five".