135551913 has 16 divisors (see below), whose sum is σ = 209172480. Its totient is φ = 76476816.

The previous prime is 135551893. The next prime is 135551917. The reversal of 135551913 is 319155531.

It is not a de Polignac number, because 135551913 - 2⁵ = 135551881 is a prime.

It is a super-2 number, since 2×135551913² = 36748642235919138, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (135551917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39195 + ... + 42512.

It is an arithmetic number, because the mean of its divisors is an integer number (13073280).

Almost surely, 2^135551913 is an apocalyptic number.

It is an amenable number.

135551913 is a deficient number, since it is larger than the sum of its proper divisors (73620567).

135551913 is an equidigital number, since it uses as much as digits as its factorization.

135551913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81796.

The product of its digits is 10125, while the sum is 33.

The square root of 135551913 is about 11642.6763675712. The cubic root of 135551913 is about 513.6909134574.

The spelling of 135551913 in words is "one hundred thirty-five million, five hundred fifty-one thousand, nine hundred thirteen".