135115521251 has 8 divisors (see below), whose sum is σ = 135957312000. Its totient is φ = 134276034760.

The previous prime is 135115521241. The next prime is 135115521269. The reversal of 135115521251 is 152125511531.

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 135115521251 - 2²² = 135111326947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135115521241) 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, 458351 + ... + 693048.

It is an arithmetic number, because the mean of its divisors is an integer number (16994664000).

Almost surely, 2^135115521251 is an apocalyptic number.

135115521251 is a deficient number, since it is larger than the sum of its proper divisors (841790749).

135115521251 is a wasteful number, since it uses less digits than its factorization.

135115521251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152129.

The product of its digits is 7500, while the sum is 32.

The spelling of 135115521251 in words is "one hundred thirty-five billion, one hundred fifteen million, five hundred twenty-one thousand, two hundred fifty-one".