135521868 has 24 divisors (see below), whose sum is σ = 322947072. Its totient is φ = 44212624.

The previous prime is 135521849. The next prime is 135521899. The reversal of 135521868 is 868125531.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119580 + ... + 120707.

It is an arithmetic number, because the mean of its divisors is an integer number (13456128).

Almost surely, 2^135521868 is an apocalyptic number.

It is an amenable number.

135521868 is an abundant number, since it is smaller than the sum of its proper divisors (187425204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135521868 is a wasteful number, since it uses less digits than its factorization.

135521868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240341 (or 240339 counting only the distinct ones).

The product of its digits is 57600, while the sum is 39.

The square root of 135521868 is about 11641.3859999572. The cubic root of 135521868 is about 513.6529575589.

The spelling of 135521868 in words is "one hundred thirty-five million, five hundred twenty-one thousand, eight hundred sixty-eight".