135555851 has 4 divisors (see below), whose sum is σ = 136953432. Its totient is φ = 134158272.

The previous prime is 135555829. The next prime is 135555877. The reversal of 135555851 is 158555531.

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 135555851 - 2¹⁸ = 135293707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135555451) by changing a digit.

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, 698645 + ... + 698838.

It is an arithmetic number, because the mean of its divisors is an integer number (34238358).

Almost surely, 2^135555851 is an apocalyptic number.

135555851 is a deficient number, since it is larger than the sum of its proper divisors (1397581).

135555851 is an equidigital number, since it uses as much as digits as its factorization.

135555851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397580.

The product of its digits is 75000, while the sum is 38.

The square root of 135555851 is about 11642.8454855332. The cubic root of 135555851 is about 513.6958879236.

The spelling of 135555851 in words is "one hundred thirty-five million, five hundred fifty-five thousand, eight hundred fifty-one".