47442521 has 16 divisors (see below), whose sum is σ = 56659200. Its totient is φ = 38864448.

The previous prime is 47442517. The next prime is 47442533. The reversal of 47442521 is 12524474.

It is not a de Polignac number, because 47442521 - 2² = 47442517 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47442821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19775 + ... + 22043.

It is an arithmetic number, because the mean of its divisors is an integer number (3541200).

Almost surely, 2^47442521 is an apocalyptic number.

It is an amenable number.

47442521 is a deficient number, since it is larger than the sum of its proper divisors (9216679).

47442521 is a wasteful number, since it uses less digits than its factorization.

47442521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2408.

The product of its digits is 8960, while the sum is 29.

The square root of 47442521 is about 6887.8531488411. The cubic root of 47442521 is about 362.0116827218.

Adding to 47442521 its reverse (12524474), we get a palindrome (59966995).

The spelling of 47442521 in words is "forty-seven million, four hundred forty-two thousand, five hundred twenty-one".