52221647 has 2 divisors, whose sum is σ = 52221648. Its totient is φ = 52221646.

The previous prime is 52221641. The next prime is 52221649. The reversal of 52221647 is 74612225.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 52221647 - 2⁶ = 52221583 is a prime.

Together with 52221649, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52221641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26110823 + 26110824.

It is an arithmetic number, because the mean of its divisors is an integer number (26110824).

Almost surely, 2^52221647 is an apocalyptic number.

52221647 is a deficient number, since it is larger than the sum of its proper divisors (1).

52221647 is an equidigital number, since it uses as much as digits as its factorization.

52221647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 29.

The square root of 52221647 is about 7226.4546632495. The cubic root of 52221647 is about 373.7806844231.

The spelling of 52221647 in words is "fifty-two million, two hundred twenty-one thousand, six hundred forty-seven".