47042581 has 2 divisors, whose sum is σ = 47042582. Its totient is φ = 47042580.

The previous prime is 47042579. The next prime is 47042603. The reversal of 47042581 is 18524074.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29528356 + 17514225 = 5434^2 + 4185^2 .

It is a cyclic number.

It is not a de Polignac number, because 47042581 - 2¹ = 47042579 is a prime.

It is a super-2 number, since 2×47042581² = 4426008854283122, which contains 22 as substring.

Together with 47042579, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47042561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23521290 + 23521291.

It is an arithmetic number, because the mean of its divisors is an integer number (23521291).

Almost surely, 2^47042581 is an apocalyptic number.

It is an amenable number.

47042581 is a deficient number, since it is larger than the sum of its proper divisors (1).

47042581 is an equidigital number, since it uses as much as digits as its factorization.

47042581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 47042581 is about 6858.7594359330. The cubic root of 47042581 is about 360.9915591062.

The spelling of 47042581 in words is "forty-seven million, forty-two thousand, five hundred eighty-one".