135521617 has 8 divisors (see below), whose sum is σ = 168962112. Its totient is φ = 105601200.

The previous prime is 135521597. The next prime is 135521627. The reversal of 135521617 is 716125531.

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 135521617 - 2¹⁵ = 135488849 is a prime.

It is a super-2 number, since 2×135521617² = 36732217348589378, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (135521627) 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, 879934 + ... + 880087.

It is an arithmetic number, because the mean of its divisors is an integer number (21120264).

Almost surely, 2^135521617 is an apocalyptic number.

It is an amenable number.

135521617 is a deficient number, since it is larger than the sum of its proper divisors (33440495).

135521617 is a wasteful number, since it uses less digits than its factorization.

135521617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1760039.

The product of its digits is 6300, while the sum is 31.

The square root of 135521617 is about 11641.3752194489. The cubic root of 135521617 is about 513.6526404466.

The spelling of 135521617 in words is "one hundred thirty-five million, five hundred twenty-one thousand, six hundred seventeen".