135020531 has 4 divisors (see below), whose sum is σ = 139376064. Its totient is φ = 130665000.

The previous prime is 135020513. The next prime is 135020539.

135020531 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 135020531 - 2⁶ = 135020467 is a prime.

It is a super-2 number, since 2×135020531² = 36461087583043922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135020539) 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, 2177720 + ... + 2177781.

It is an arithmetic number, because the mean of its divisors is an integer number (34844016).

Almost surely, 2^135020531 is an apocalyptic number.

135020531 is a deficient number, since it is larger than the sum of its proper divisors (4355533).

135020531 is an equidigital number, since it uses as much as digits as its factorization.

135020531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4355532.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 135020531 is about 11619.8335186009. The cubic root of 135020531 is about 513.0187882523.

The spelling of 135020531 in words is "one hundred thirty-five million, twenty thousand, five hundred thirty-one".