135431545 has 4 divisors (see below), whose sum is σ = 162517860. Its totient is φ = 108345232.

The previous prime is 135431539. The next prime is 135431551. The reversal of 135431545 is 545134531.

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

It is an interprime number because it is at equal distance from previous prime (135431539) and next prime (135431551).

It can be written as a sum of positive squares in 2 ways, for example, as 91699776 + 43731769 = 9576^2 + 6613^2 .

It is a cyclic number.

It is not a de Polignac number, because 135431545 - 2²¹ = 133334393 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13543150 + ... + 13543159.

It is an arithmetic number, because the mean of its divisors is an integer number (40629465).

Almost surely, 2^135431545 is an apocalyptic number.

It is an amenable number.

135431545 is a deficient number, since it is larger than the sum of its proper divisors (27086315).

135431545 is an equidigital number, since it uses as much as digits as its factorization.

135431545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27086314.

The product of its digits is 18000, while the sum is 31.

The square root of 135431545 is about 11637.5059613304. The cubic root of 135431545 is about 513.5388185699.

The spelling of 135431545 in words is "one hundred thirty-five million, four hundred thirty-one thousand, five hundred forty-five".