135885631 has 8 divisors (see below), whose sum is σ = 157425824. Its totient is φ = 114877440.

The previous prime is 135885611. The next prime is 135885647. The reversal of 135885631 is 136588531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135885631 - 2¹⁷ = 135754559 is a prime.

It is a super-2 number, since 2×135885631² = 36929809424536322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135885611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132450 + ... + 133471.

It is an arithmetic number, because the mean of its divisors is an integer number (19678228).

Almost surely, 2^135885631 is an apocalyptic number.

135885631 is a deficient number, since it is larger than the sum of its proper divisors (21540193).

135885631 is an equidigital number, since it uses as much as digits as its factorization.

135885631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266001.

The product of its digits is 86400, while the sum is 40.

The square root of 135885631 is about 11656.9992279317. Note that the first 3 decimals coincide. The cubic root of 135885631 is about 514.1121233391.

The spelling of 135885631 in words is "one hundred thirty-five million, eight hundred eighty-five thousand, six hundred thirty-one".