47538021 has 8 divisors (see below), whose sum is σ = 63734944. Its totient is φ = 31516560.

The previous prime is 47537969. The next prime is 47538077. The reversal of 47538021 is 12083574.

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

It is not a de Polignac number, because 47538021 - 2⁹ = 47537509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47538021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47518021) 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, 43231 + ... + 44316.

It is an arithmetic number, because the mean of its divisors is an integer number (7966868).

Almost surely, 2^47538021 is an apocalyptic number.

It is an amenable number.

47538021 is a deficient number, since it is larger than the sum of its proper divisors (16196923).

47538021 is a wasteful number, since it uses less digits than its factorization.

47538021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87731.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 47538021 is about 6894.7821575449. The cubic root of 47538021 is about 362.2544251915.

The spelling of 47538021 in words is "forty-seven million, five hundred thirty-eight thousand, twenty-one".