47201220 has 144 divisors (see below), whose sum is σ = 161441280. Its totient is φ = 11059200.

The previous prime is 47201213. The next prime is 47201227. The reversal of 47201220 is 2210274.

It is an interprime number because it is at equal distance from previous prime (47201213) and next prime (47201227).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 47201193 and 47201202.

It is not an unprimeable number, because it can be changed into a prime (47201227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60996 + ... + 61764.

It is an arithmetic number, because the mean of its divisors is an integer number (1121120).

Almost surely, 2^47201220 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 47201220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80720640).

47201220 is an abundant number, since it is smaller than the sum of its proper divisors (114240060).

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

47201220 is a wasteful number, since it uses less digits than its factorization.

47201220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826 (or 821 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 47201220 is about 6870.3144032861. The cubic root of 47201220 is about 361.3968875408.

Adding to 47201220 its reverse (2210274), we get a palindrome (49411494).

The spelling of 47201220 in words is "forty-seven million, two hundred one thousand, two hundred twenty".