47923221 has 16 divisors (see below), whose sum is σ = 69099264. Its totient is φ = 29428224.

The previous prime is 47923201. The next prime is 47923223. The reversal of 47923221 is 12232974.

It is not a de Polignac number, because 47923221 - 2⁹ = 47922709 is a prime.

It is a super-2 number, since 2×47923221² = 4593270222029682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47923223) 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 15 ways as a sum of consecutive naturals, for example, 7600 + ... + 12393.

It is an arithmetic number, because the mean of its divisors is an integer number (4318704).

Almost surely, 2^47923221 is an apocalyptic number.

It is an amenable number.

47923221 is a deficient number, since it is larger than the sum of its proper divisors (21176043).

47923221 is a wasteful number, since it uses less digits than its factorization.

47923221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20060.

The product of its digits is 6048, while the sum is 30.

The square root of 47923221 is about 6922.6599656490. The cubic root of 47923221 is about 363.2302419599.

The spelling of 47923221 in words is "forty-seven million, nine hundred twenty-three thousand, two hundred twenty-one".