47251220 has 24 divisors (see below), whose sum is σ = 101910984. Its totient is φ = 18389376.

The previous prime is 47251201. The next prime is 47251241. The reversal of 47251220 is 2215274.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3400336 + 43850884 = 1844^2 + 6622^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31187 + ... + 32666.

It is an arithmetic number, because the mean of its divisors is an integer number (4246291).

Almost surely, 2^47251220 is an apocalyptic number.

It is an amenable number.

47251220 is an abundant number, since it is smaller than the sum of its proper divisors (54659764).

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

47251220 is a wasteful number, since it uses less digits than its factorization.

47251220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63899 (or 63897 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 47251220 is about 6873.9522838030. The cubic root of 47251220 is about 361.5244511059.

Adding to 47251220 its reverse (2215274), we get a palindrome (49466494).

The spelling of 47251220 in words is "forty-seven million, two hundred fifty-one thousand, two hundred twenty".