135207031 has 2 divisors, whose sum is σ = 135207032. Its totient is φ = 135207030.

The previous prime is 135207029. The next prime is 135207067. The reversal of 135207031 is 130702531.

It is a weak prime.

It is an emirp because it is prime and its reverse (130702531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135207031 - 2¹ = 135207029 is a prime.

It is a super-2 number, since 2×135207031² = 36561882463669922, which contains 22 as substring.

Together with 135207029, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 135206993 and 135207011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135207011) 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, 67603515 + 67603516.

It is an arithmetic number, because the mean of its divisors is an integer number (67603516).

Almost surely, 2^135207031 is an apocalyptic number.

135207031 is a deficient number, since it is larger than the sum of its proper divisors (1).

135207031 is an equidigital number, since it uses as much as digits as its factorization.

135207031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 135207031 is about 11627.8558212596. The cubic root of 135207031 is about 513.2548856434.

Adding to 135207031 its reverse (130702531), we get a palindrome (265909562).

The spelling of 135207031 in words is "one hundred thirty-five million, two hundred seven thousand, thirty-one".