135543451 has 4 divisors (see below), whose sum is σ = 136047600. Its totient is φ = 135039304.

The previous prime is 135543449. The next prime is 135543491. The reversal of 135543451 is 154345531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 154345531 = 19 ⋅8123449.

It is a cyclic number.

It is not a de Polignac number, because 135543451 - 2¹ = 135543449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135543491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251671 + ... + 252208.

It is an arithmetic number, because the mean of its divisors is an integer number (34011900).

Almost surely, 2^135543451 is an apocalyptic number.

135543451 is a deficient number, since it is larger than the sum of its proper divisors (504149).

135543451 is an equidigital number, since it uses as much as digits as its factorization.

135543451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504148.

The product of its digits is 18000, while the sum is 31.

The square root of 135543451 is about 11642.3129574840. The cubic root of 135543451 is about 513.6802239661.

Adding to 135543451 its reverse (154345531), we get a palindrome (289888982).

The spelling of 135543451 in words is "one hundred thirty-five million, five hundred forty-three thousand, four hundred fifty-one".