47243257281 has 24 divisors (see below), whose sum is σ = 75555034464. Its totient is φ = 28204925760.

The previous prime is 47243257241. The next prime is 47243257367. The reversal of 47243257281 is 18275234274.

47243257281 is a `hidden beast` number, since 4 + 72 + 4 + 3 + 2 + 572 + 8 + 1 = 666.

It is not a de Polignac number, because 47243257281 - 2⁷ = 47243257153 is a prime.

It is a super-2 number, since 2×47243257281² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (47243257241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3554596 + ... + 3567861.

It is an arithmetic number, because the mean of its divisors is an integer number (3148126436).

Almost surely, 2^47243257281 is an apocalyptic number.

It is an amenable number.

47243257281 is a deficient number, since it is larger than the sum of its proper divisors (28311777183).

47243257281 is a wasteful number, since it uses less digits than its factorization.

47243257281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7122541 (or 7122538 counting only the distinct ones).

The product of its digits is 752640, while the sum is 45.

The spelling of 47243257281 in words is "forty-seven billion, two hundred forty-three million, two hundred fifty-seven thousand, two hundred eighty-one".