47842581 has 4 divisors (see below), whose sum is σ = 63790112. Its totient is φ = 31895052.

The previous prime is 47842567. The next prime is 47842601. The reversal of 47842581 is 18524874.

It is a happy number.

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.

It is not a de Polignac number, because 47842581 - 2¹⁰ = 47841557 is a prime.

It is a super-2 number, since 2×47842581² = 4577825113483122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47842511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7973761 + ... + 7973766.

It is an arithmetic number, because the mean of its divisors is an integer number (15947528).

Almost surely, 2^47842581 is an apocalyptic number.

It is an amenable number.

47842581 is a deficient number, since it is larger than the sum of its proper divisors (15947531).

47842581 is a wasteful number, since it uses less digits than its factorization.

47842581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15947530.

The product of its digits is 71680, while the sum is 39.

The square root of 47842581 is about 6916.8331626547. The cubic root of 47842581 is about 363.0263927565.

The spelling of 47842581 in words is "forty-seven million, eight hundred forty-two thousand, five hundred eighty-one".