135313631 has 2 divisors, whose sum is σ = 135313632. Its totient is φ = 135313630.

The previous prime is 135313613. The next prime is 135313637. The reversal of 135313631 is 136313531.

It is a happy number.

Together with previous prime (135313613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135313631 - 2⁶ = 135313567 is a prime.

It is a super-2 number, since 2×135313631² = 36619557468808322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 135313631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135313637) 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, 67656815 + 67656816.

It is an arithmetic number, because the mean of its divisors is an integer number (67656816).

Almost surely, 2^135313631 is an apocalyptic number.

135313631 is a deficient number, since it is larger than the sum of its proper divisors (1).

135313631 is an equidigital number, since it uses as much as digits as its factorization.

135313631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2430, while the sum is 26.

The square root of 135313631 is about 11632.4387382870. The cubic root of 135313631 is about 513.3897371073.

The spelling of 135313631 in words is "one hundred thirty-five million, three hundred thirteen thousand, six hundred thirty-one".