135143551 has 2 divisors, whose sum is σ = 135143552. Its totient is φ = 135143550.

The previous prime is 135143543. The next prime is 135143611. The reversal of 135143551 is 155341531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135143551 - 2³ = 135143543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135143521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67571775 + 67571776.

It is an arithmetic number, because the mean of its divisors is an integer number (67571776).

Almost surely, 2^135143551 is an apocalyptic number.

135143551 is a deficient number, since it is larger than the sum of its proper divisors (1).

135143551 is an equidigital number, since it uses as much as digits as its factorization.

135143551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4500, while the sum is 28.

The square root of 135143551 is about 11625.1258487812. The cubic root of 135143551 is about 513.1745483014.

The spelling of 135143551 in words is "one hundred thirty-five million, one hundred forty-three thousand, five hundred fifty-one".