52566139 has 2 divisors, whose sum is σ = 52566140. Its totient is φ = 52566138.

The previous prime is 52566133. The next prime is 52566161. The reversal of 52566139 is 93166525.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 52566139 - 2⁹ = 52565627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 52566098 and 52566107.

It is not a weakly prime, because it can be changed into another prime (52566133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26283069 + 26283070.

It is an arithmetic number, because the mean of its divisors is an integer number (26283070).

Almost surely, 2^52566139 is an apocalyptic number.

52566139 is a deficient number, since it is larger than the sum of its proper divisors (1).

52566139 is an equidigital number, since it uses as much as digits as its factorization.

52566139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48600, while the sum is 37.

The square root of 52566139 is about 7250.2509611737. The cubic root of 52566139 is about 374.6007935457.

The spelling of 52566139 in words is "fifty-two million, five hundred sixty-six thousand, one hundred thirty-nine".