52205639 has 2 divisors, whose sum is σ = 52205640. Its totient is φ = 52205638.

The previous prime is 52205627. The next prime is 52205641. The reversal of 52205639 is 93650225.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52205639 is a prime.

Together with 52205641, 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 (52205339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26102819 + 26102820.

It is an arithmetic number, because the mean of its divisors is an integer number (26102820).

Almost surely, 2^52205639 is an apocalyptic number.

52205639 is a deficient number, since it is larger than the sum of its proper divisors (1).

52205639 is an equidigital number, since it uses as much as digits as its factorization.

52205639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 52205639 is about 7225.3469812875. The cubic root of 52205639 is about 373.7424876661.

The spelling of 52205639 in words is "fifty-two million, two hundred five thousand, six hundred thirty-nine".