135216454 has 16 divisors (see below), whose sum is σ = 206336160. Its totient is φ = 66447040.

The previous prime is 135216449. The next prime is 135216469. The reversal of 135216454 is 454612531.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28599 + ... + 32989.

It is an arithmetic number, because the mean of its divisors is an integer number (12896010).

Almost surely, 2^135216454 is an apocalyptic number.

135216454 is a deficient number, since it is larger than the sum of its proper divisors (71119706).

135216454 is a wasteful number, since it uses less digits than its factorization.

135216454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4655.

The product of its digits is 14400, while the sum is 31.

The square root of 135216454 is about 11628.2610049826. The cubic root of 135216454 is about 513.2668088115.

Adding to 135216454 its reverse (454612531), we get a palindrome (589828985).

The spelling of 135216454 in words is "one hundred thirty-five million, two hundred sixteen thousand, four hundred fifty-four".