135497551 has 4 divisors (see below), whose sum is σ = 154854352. Its totient is φ = 116140752.

The previous prime is 135497543. The next prime is 135497611. The reversal of 135497551 is 155794531.

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

It is not a de Polignac number, because 135497551 - 2³ = 135497543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135492551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9678390 + ... + 9678403.

It is an arithmetic number, because the mean of its divisors is an integer number (38713588).

Almost surely, 2^135497551 is an apocalyptic number.

135497551 is a deficient number, since it is larger than the sum of its proper divisors (19356801).

135497551 is an equidigital number, since it uses as much as digits as its factorization.

135497551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19356800.

The product of its digits is 94500, while the sum is 40.

The square root of 135497551 is about 11640.3415327902. The cubic root of 135497551 is about 513.6222337446.

The spelling of 135497551 in words is "one hundred thirty-five million, four hundred ninety-seven thousand, five hundred fifty-one".