13135881 has 12 divisors (see below), whose sum is σ = 19252016. Its totient is φ = 7960920.

The previous prime is 13135879. The next prime is 13135919. The reversal of 13135881 is 18853131.

It is not a de Polignac number, because 13135881 - 2¹ = 13135879 is a prime.

It is a super-2 number, since 2×13135881² = 345102739292322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13135861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17731 + ... + 18456.

Almost surely, 2^13135881 is an apocalyptic number.

13135881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13135881 is a deficient number, since it is larger than the sum of its proper divisors (6116135).

13135881 is a wasteful number, since it uses less digits than its factorization.

13135881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36212 (or 36201 counting only the distinct ones).

The product of its digits is 2880, while the sum is 30.

The square root of 13135881 is about 3624.3455961042. The cubic root of 13135881 is about 235.9498660624.

The spelling of 13135881 in words is "thirteen million, one hundred thirty-five thousand, eight hundred eighty-one".