47422921 has 12 divisors (see below), whose sum is σ = 58688832. Its totient is φ = 37520496.

The previous prime is 47422913. The next prime is 47422927. The reversal of 47422921 is 12922474.

It is not a de Polignac number, because 47422921 - 2³ = 47422913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47422927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18861 + ... + 21226.

It is an arithmetic number, because the mean of its divisors is an integer number (4890736).

Almost surely, 2^47422921 is an apocalyptic number.

It is an amenable number.

47422921 is a deficient number, since it is larger than the sum of its proper divisors (11265911).

47422921 is a wasteful number, since it uses less digits than its factorization.

47422921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40120 (or 40107 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 47422921 is about 6886.4302072990. The cubic root of 47422921 is about 361.9618230448.

The spelling of 47422921 in words is "forty-seven million, four hundred twenty-two thousand, nine hundred twenty-one".