47566421 has 4 divisors (see below), whose sum is σ = 54361632. Its totient is φ = 40771212.

The previous prime is 47566417. The next prime is 47566427. The reversal of 47566421 is 12466574.

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 47566421 - 2² = 47566417 is a prime.

It is a super-3 number, since 3×47566421³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47566427) 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, 3397595 + ... + 3397608.

It is an arithmetic number, because the mean of its divisors is an integer number (13590408).

Almost surely, 2^47566421 is an apocalyptic number.

It is an amenable number.

47566421 is a deficient number, since it is larger than the sum of its proper divisors (6795211).

47566421 is an equidigital number, since it uses as much as digits as its factorization.

47566421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6795210.

The product of its digits is 40320, while the sum is 35.

The square root of 47566421 is about 6896.8413784862. The cubic root of 47566421 is about 362.3265497590.

The spelling of 47566421 in words is "forty-seven million, five hundred sixty-six thousand, four hundred twenty-one".