47287581 has 8 divisors (see below), whose sum is σ = 68781984. Its totient is φ = 28659120.

The previous prime is 47287571. The next prime is 47287601. The reversal of 47287581 is 18578274.

47287581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 47287581 - 2⁵ = 47287549 is a prime.

It is a super-2 number, since 2×47287581² = 4472230633663122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47287511) 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 7 ways as a sum of consecutive naturals, for example, 716446 + ... + 716511.

It is an arithmetic number, because the mean of its divisors is an integer number (8597748).

Almost surely, 2^47287581 is an apocalyptic number.

It is an amenable number.

47287581 is a deficient number, since it is larger than the sum of its proper divisors (21494403).

47287581 is a wasteful number, since it uses less digits than its factorization.

47287581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1432971.

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

The square root of 47287581 is about 6876.5966146052. The cubic root of 47287581 is about 361.6171613760.

The spelling of 47287581 in words is "forty-seven million, two hundred eighty-seven thousand, five hundred eighty-one".