47566021 has 4 divisors (see below), whose sum is σ = 48578112. Its totient is φ = 46553932.

The previous prime is 47566009. The next prime is 47566037. The reversal of 47566021 is 12066574.

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 47566021 - 2⁷ = 47565893 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 (47566081) 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, 505975 + ... + 506068.

It is an arithmetic number, because the mean of its divisors is an integer number (12144528).

Almost surely, 2^47566021 is an apocalyptic number.

It is an amenable number.

47566021 is a deficient number, since it is larger than the sum of its proper divisors (1012091).

47566021 is a wasteful number, since it uses less digits than its factorization.

47566021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012090.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 47566021 is about 6896.8123796432. The cubic root of 47566021 is about 362.3255341193.

The spelling of 47566021 in words is "forty-seven million, five hundred sixty-six thousand, twenty-one".