135567881 has 8 divisors (see below), whose sum is σ = 138720000. Its totient is φ = 132427008.

The previous prime is 135567797. The next prime is 135567893. The reversal of 135567881 is 188765531.

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 135567881 - 2²² = 131373577 is a prime.

It is a super-2 number, since 2×135567881² = 36757300717660322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135567281) 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, 24620 + ... + 29618.

It is an arithmetic number, because the mean of its divisors is an integer number (17340000).

Almost surely, 2^135567881 is an apocalyptic number.

It is an amenable number.

135567881 is a deficient number, since it is larger than the sum of its proper divisors (3152119).

135567881 is an equidigital number, since it uses as much as digits as its factorization.

135567881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5623.

The product of its digits is 201600, while the sum is 44.

The square root of 135567881 is about 11643.3621003557. The cubic root of 135567881 is about 513.7110835758.

The spelling of 135567881 in words is "one hundred thirty-five million, five hundred sixty-seven thousand, eight hundred eighty-one".