135144251 has 8 divisors (see below), whose sum is σ = 153840384. Its totient is φ = 117516520.

The previous prime is 135144157. The next prime is 135144253. The reversal of 135144251 is 152441531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135144251 - 2¹⁰ = 135143227 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135144251.

It is not an unprimeable number, because it can be changed into a prime (135144253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266831 + ... + 267336.

It is an arithmetic number, because the mean of its divisors is an integer number (19230048).

Almost surely, 2^135144251 is an apocalyptic number.

135144251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

135144251 is a deficient number, since it is larger than the sum of its proper divisors (18696133).

135144251 is a wasteful number, since it uses less digits than its factorization.

135144251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534201.

The product of its digits is 2400, while the sum is 26.

The square root of 135144251 is about 11625.1559559431. The cubic root of 135144251 is about 513.1754343261.

Adding to 135144251 its reverse (152441531), we get a palindrome (287585782).

The spelling of 135144251 in words is "one hundred thirty-five million, one hundred forty-four thousand, two hundred fifty-one".