47530821 has 8 divisors (see below), whose sum is σ = 68249440. Its totient is φ = 29249712.

The previous prime is 47530807. The next prime is 47530823. The reversal of 47530821 is 12803574.

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

It is not a de Polignac number, because 47530821 - 2⁶ = 47530757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47530823) 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, 609331 + ... + 609408.

It is an arithmetic number, because the mean of its divisors is an integer number (8531180).

Almost surely, 2^47530821 is an apocalyptic number.

It is an amenable number.

47530821 is a deficient number, since it is larger than the sum of its proper divisors (20718619).

47530821 is a wasteful number, since it uses less digits than its factorization.

47530821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218755.

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

The square root of 47530821 is about 6894.2600038003. The cubic root of 47530821 is about 362.2361355257.

The spelling of 47530821 in words is "forty-seven million, five hundred thirty thousand, eight hundred twenty-one".