235251139 has 2 divisors, whose sum is σ = 235251140. Its totient is φ = 235251138.

The previous prime is 235251127. The next prime is 235251169. The reversal of 235251139 is 931152532.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 235251139 - 2¹³ = 235242947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 235251139.

It is not a weakly prime, because it can be changed into another prime (235251169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117625569 + 117625570.

It is an arithmetic number, because the mean of its divisors is an integer number (117625570).

Almost surely, 2^235251139 is an apocalyptic number.

235251139 is a deficient number, since it is larger than the sum of its proper divisors (1).

235251139 is an equidigital number, since it uses as much as digits as its factorization.

235251139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8100, while the sum is 31.

The square root of 235251139 is about 15337.8987804719. The cubic root of 235251139 is about 617.3203279982.

The spelling of 235251139 in words is "two hundred thirty-five million, two hundred fifty-one thousand, one hundred thirty-nine".