47985521 has 8 divisors (see below), whose sum is σ = 50155200. Its totient is φ = 45822832.

The previous prime is 47985451. The next prime is 47985533. The reversal of 47985521 is 12558974.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47985521 is a prime.

It is a super-2 number, since 2×47985521² = 4605220451282882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49985521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16430 + ... + 19128.

It is an arithmetic number, because the mean of its divisors is an integer number (6269400).

Almost surely, 2^47985521 is an apocalyptic number.

It is an amenable number.

47985521 is a deficient number, since it is larger than the sum of its proper divisors (2169679).

47985521 is a wasteful number, since it uses less digits than its factorization.

47985521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3495.

The product of its digits is 100800, while the sum is 41.

The square root of 47985521 is about 6927.1582196453. The cubic root of 47985521 is about 363.3875731012.

The spelling of 47985521 in words is "forty-seven million, nine hundred eighty-five thousand, five hundred twenty-one".