525135139 has 2 divisors, whose sum is σ = 525135140. Its totient is φ = 525135138.

The previous prime is 525135131. The next prime is 525135173. The reversal of 525135139 is 931531525.

It is an a-pointer prime, because the next prime (525135173) can be obtained adding 525135139 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 525135139 - 2³ = 525135131 is a prime.

It is not a weakly prime, because it can be changed into another prime (525135131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262567569 + 262567570.

It is an arithmetic number, because the mean of its divisors is an integer number (262567570).

Almost surely, 2^525135139 is an apocalyptic number.

525135139 is a deficient number, since it is larger than the sum of its proper divisors (1).

525135139 is an equidigital number, since it uses as much as digits as its factorization.

525135139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20250, while the sum is 34.

The square root of 525135139 is about 22915.8272597783. The cubic root of 525135139 is about 806.7835352117.

The spelling of 525135139 in words is "five hundred twenty-five million, one hundred thirty-five thousand, one hundred thirty-nine".