135320331 has 8 divisors (see below), whose sum is σ = 180726784. Its totient is φ = 90063720.

The previous prime is 135320291. The next prime is 135320333. The reversal of 135320331 is 133023531.

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

It is not a de Polignac number, because 135320331 - 2¹³ = 135312139 is a prime.

It is a super-2 number, since 2×135320331² = 36623183963899122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135320298 and 135320307.

It is not an unprimeable number, because it can be changed into a prime (135320333) 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, 35335 + ... + 38976.

It is an arithmetic number, because the mean of its divisors is an integer number (22590848).

Almost surely, 2^135320331 is an apocalyptic number.

135320331 is a deficient number, since it is larger than the sum of its proper divisors (45406453).

135320331 is an equidigital number, since it uses as much as digits as its factorization.

135320331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74921.

The product of its (nonzero) digits is 810, while the sum is 21.

The square root of 135320331 is about 11632.7267224843. The cubic root of 135320331 is about 513.3982103962.

Adding to 135320331 its reverse (133023531), we get a palindrome (268343862).

The spelling of 135320331 in words is "one hundred thirty-five million, three hundred twenty thousand, three hundred thirty-one".