52142239 has 2 divisors, whose sum is σ = 52142240. Its totient is φ = 52142238.

The previous prime is 52142197. The next prime is 52142249. The reversal of 52142239 is 93224125.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 52142239 - 2¹¹ = 52140191 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52142249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26071119 + 26071120.

It is an arithmetic number, because the mean of its divisors is an integer number (26071120).

Almost surely, 2^52142239 is an apocalyptic number.

52142239 is a deficient number, since it is larger than the sum of its proper divisors (1).

52142239 is an equidigital number, since it uses as much as digits as its factorization.

52142239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 28.

The square root of 52142239 is about 7220.9583159024. The cubic root of 52142239 is about 373.5911319076.

The spelling of 52142239 in words is "fifty-two million, one hundred forty-two thousand, two hundred thirty-nine".