135520323 has 8 divisors (see below), whose sum is σ = 181098000. Its totient is φ = 90144768.

The previous prime is 135520309. The next prime is 135520351. The reversal of 135520323 is 323025531.

It is a happy number.

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

It is not a de Polignac number, because 135520323 - 2¹⁴ = 135503939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135520293 and 135520302.

It is not an unprimeable number, because it can be changed into a prime (135520373) 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, 48958 + ... + 51651.

It is an arithmetic number, because the mean of its divisors is an integer number (22637250).

Almost surely, 2^135520323 is an apocalyptic number.

135520323 is a deficient number, since it is larger than the sum of its proper divisors (45577677).

135520323 is a wasteful number, since it uses less digits than its factorization.

135520323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101061.

The product of its (nonzero) digits is 2700, while the sum is 24.

The square root of 135520323 is about 11641.3196416901. The cubic root of 135520323 is about 513.6510056062.

Adding to 135520323 its reverse (323025531), we get a palindrome (458545854).

The spelling of 135520323 in words is "one hundred thirty-five million, five hundred twenty thousand, three hundred twenty-three".