135531051 has 4 divisors (see below), whose sum is σ = 180708072. Its totient is φ = 90354032.

The previous prime is 135531043. The next prime is 135531073. The reversal of 135531051 is 150135531.

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

It is a cyclic number.

It is not a de Polignac number, because 135531051 - 2³ = 135531043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135531041) 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, 22588506 + ... + 22588511.

It is an arithmetic number, because the mean of its divisors is an integer number (45177018).

Almost surely, 2^135531051 is an apocalyptic number.

135531051 is a deficient number, since it is larger than the sum of its proper divisors (45177021).

135531051 is an equidigital number, since it uses as much as digits as its factorization.

135531051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45177020.

The product of its (nonzero) digits is 1125, while the sum is 24.

The square root of 135531051 is about 11641.7804050755. The cubic root of 135531051 is about 513.6645590533.

Adding to 135531051 its reverse (150135531), we get a palindrome (285666582).

The spelling of 135531051 in words is "one hundred thirty-five million, five hundred thirty-one thousand, fifty-one".