47221845 has 32 divisors (see below), whose sum is σ = 83064960. Its totient is φ = 22717440.

The previous prime is 47221841. The next prime is 47221883. The reversal of 47221845 is 54812274.

It is not a de Polignac number, because 47221845 - 2² = 47221841 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47221841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21561 + ... + 23649.

It is an arithmetic number, because the mean of its divisors is an integer number (2595780).

Almost surely, 2^47221845 is an apocalyptic number.

It is an amenable number.

47221845 is a deficient number, since it is larger than the sum of its proper divisors (35843115).

47221845 is a wasteful number, since it uses less digits than its factorization.

47221845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2245.

The product of its digits is 17920, while the sum is 33.

The square root of 47221845 is about 6871.8152623597. The cubic root of 47221845 is about 361.4495184220.

The spelling of 47221845 in words is "forty-seven million, two hundred twenty-one thousand, eight hundred forty-five".