47225821 has 4 divisors (see below), whose sum is σ = 47930752. Its totient is φ = 46520892.

The previous prime is 47225819. The next prime is 47225837. The reversal of 47225821 is 12852274.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 47225821 - 2¹ = 47225819 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 (47225221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352365 + ... + 352498.

It is an arithmetic number, because the mean of its divisors is an integer number (11982688).

Almost surely, 2^47225821 is an apocalyptic number.

It is an amenable number.

47225821 is a deficient number, since it is larger than the sum of its proper divisors (704931).

47225821 is an equidigital number, since it uses as much as digits as its factorization.

47225821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704930.

The product of its digits is 8960, while the sum is 31.

The square root of 47225821 is about 6872.1045539194. The cubic root of 47225821 is about 361.4596626180.

The spelling of 47225821 in words is "forty-seven million, two hundred twenty-five thousand, eight hundred twenty-one".