47581220 has 48 divisors (see below), whose sum is σ = 104035008. Its totient is φ = 18264960.

The previous prime is 47581217. The next prime is 47581231. The reversal of 47581220 is 2218574.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52007 + ... + 52913.

It is an arithmetic number, because the mean of its divisors is an integer number (2167396).

Almost surely, 2^47581220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47581220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52017504).

47581220 is an abundant number, since it is smaller than the sum of its proper divisors (56453788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

47581220 is a wasteful number, since it uses less digits than its factorization.

47581220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020 (or 1018 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 47581220 is about 6897.9141774887. The cubic root of 47581220 is about 362.3641218845.

Adding to 47581220 its reverse (2218574), we get a palindrome (49799794).

The spelling of 47581220 in words is "forty-seven million, five hundred eighty-one thousand, two hundred twenty".