135212431 has 2 divisors, whose sum is σ = 135212432. Its totient is φ = 135212430.

The previous prime is 135212411. The next prime is 135212443. The reversal of 135212431 is 134212531.

It is a happy number.

135212431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135212431 - 2⁹ = 135211919 is a prime.

It is a super-2 number, since 2×135212431² = 36564802993859522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135212411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67606215 + 67606216.

It is an arithmetic number, because the mean of its divisors is an integer number (67606216).

Almost surely, 2^135212431 is an apocalyptic number.

135212431 is a deficient number, since it is larger than the sum of its proper divisors (1).

135212431 is an equidigital number, since it uses as much as digits as its factorization.

135212431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 22.

The square root of 135212431 is about 11628.0880199627. The cubic root of 135212431 is about 513.2617184722.

Adding to 135212431 its reverse (134212531), we get a palindrome (269424962).

The spelling of 135212431 in words is "one hundred thirty-five million, two hundred twelve thousand, four hundred thirty-one".