135425231 has 2 divisors, whose sum is σ = 135425232. Its totient is φ = 135425230.

The previous prime is 135425221. The next prime is 135425263. The reversal of 135425231 is 132524531.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135425231 is a prime.

It is a super-2 number, since 2×135425231² = 36679986382806722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135425231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135425221) 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, 67712615 + 67712616.

It is an arithmetic number, because the mean of its divisors is an integer number (67712616).

Almost surely, 2^135425231 is an apocalyptic number.

135425231 is a deficient number, since it is larger than the sum of its proper divisors (1).

135425231 is an equidigital number, since it uses as much as digits as its factorization.

135425231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 26.

The square root of 135425231 is about 11637.2346801119. The cubic root of 135425231 is about 513.5308378234.

Adding to 135425231 its reverse (132524531), we get a palindrome (267949762).

The spelling of 135425231 in words is "one hundred thirty-five million, four hundred twenty-five thousand, two hundred thirty-one".