135615550 has 48 divisors (see below), whose sum is σ = 295016832. Its totient is φ = 45410400.

The previous prime is 135615541. The next prime is 135615589. The reversal of 135615550 is 55516531.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10545 + ... + 19555.

It is an arithmetic number, because the mean of its divisors is an integer number (6146184).

Almost surely, 2^135615550 is an apocalyptic number.

135615550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

135615550 is an abundant number, since it is smaller than the sum of its proper divisors (159401282).

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

135615550 is a wasteful number, since it uses less digits than its factorization.

135615550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9073 (or 9068 counting only the distinct ones).

The product of its (nonzero) digits is 11250, while the sum is 31.

The square root of 135615550 is about 11645.4089666271. The cubic root of 135615550 is about 513.7712876690.

The spelling of 135615550 in words is "one hundred thirty-five million, six hundred fifteen thousand, five hundred fifty".