47918331 has 16 divisors (see below), whose sum is σ = 71132320. Its totient is φ = 31881600.

The previous prime is 47918329. The next prime is 47918341. The reversal of 47918331 is 13381974.

It is a happy number.

47918331 is a `hidden beast` number, since 479 + 183 + 3 + 1 = 666.

It is not a de Polignac number, because 47918331 - 2¹ = 47918329 is a prime.

It is a super-2 number, since 2×47918331² = 4592332891651122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47918341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14751 + ... + 17703.

It is an arithmetic number, because the mean of its divisors is an integer number (4445770).

Almost surely, 2^47918331 is an apocalyptic number.

47918331 is a deficient number, since it is larger than the sum of its proper divisors (23213989).

47918331 is a wasteful number, since it uses less digits than its factorization.

47918331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3563 (or 3557 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 47918331 is about 6922.3067687007. The cubic root of 47918331 is about 363.2178870843.

The spelling of 47918331 in words is "forty-seven million, nine hundred eighteen thousand, three hundred thirty-one".