47757481 has 4 divisors (see below), whose sum is σ = 48101200. Its totient is φ = 47413764.

The previous prime is 47757443. The next prime is 47757551. The reversal of 47757481 is 18475774.

47757481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18475774 = 2 ⋅9237887.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47757481 is a prime.

It is a super-2 number, since 2×47757481² = 4561553982930722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47757421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171651 + ... + 171928.

It is an arithmetic number, because the mean of its divisors is an integer number (12025300).

Almost surely, 2^47757481 is an apocalyptic number.

It is an amenable number.

47757481 is a deficient number, since it is larger than the sum of its proper divisors (343719).

47757481 is a wasteful number, since it uses less digits than its factorization.

47757481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343718.

The product of its digits is 219520, while the sum is 43.

The square root of 47757481 is about 6910.6787655049. The cubic root of 47757481 is about 362.8110205867.

The spelling of 47757481 in words is "forty-seven million, seven hundred fifty-seven thousand, four hundred eighty-one".