135407551 has 2 divisors, whose sum is σ = 135407552. Its totient is φ = 135407550.

The previous prime is 135407549. The next prime is 135407557. The reversal of 135407551 is 155704531.

135407551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (155704531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135407551 - 2¹ = 135407549 is a prime.

Together with 135407549, 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 (135407557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67703775 + 67703776.

It is an arithmetic number, because the mean of its divisors is an integer number (67703776).

Almost surely, 2^135407551 is an apocalyptic number.

135407551 is a deficient number, since it is larger than the sum of its proper divisors (1).

135407551 is an equidigital number, since it uses as much as digits as its factorization.

135407551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10500, while the sum is 31.

The square root of 135407551 is about 11636.4750246799. The cubic root of 135407551 is about 513.5084894021.

The spelling of 135407551 in words is "one hundred thirty-five million, four hundred seven thousand, five hundred fifty-one".