135122551 has 2 divisors, whose sum is σ = 135122552. Its totient is φ = 135122550.

The previous prime is 135122549. The next prime is 135122563. The reversal of 135122551 is 155221531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135122551 - 2¹ = 135122549 is a prime.

Together with 135122549, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135122591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67561275 + 67561276.

It is an arithmetic number, because the mean of its divisors is an integer number (67561276).

Almost surely, 2^135122551 is an apocalyptic number.

135122551 is a deficient number, since it is larger than the sum of its proper divisors (1).

135122551 is an equidigital number, since it uses as much as digits as its factorization.

135122551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1500, while the sum is 25.

The square root of 135122551 is about 11624.2225976622. Note that the first 3 decimals coincide. The cubic root of 135122551 is about 513.1479661383.

The spelling of 135122551 in words is "one hundred thirty-five million, one hundred twenty-two thousand, five hundred fifty-one".