135191552 has 66 divisors (see below), whose sum is σ = 281306928. Its totient is φ = 64909312.

The previous prime is 135191549. The next prime is 135191557. The reversal of 135191552 is 255191531.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135191557) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2550758 + ... + 2550810.

Almost surely, 2^135191552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 135191552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140653464).

135191552 is an abundant number, since it is smaller than the sum of its proper divisors (146115376).

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

135191552 is an frugal number, since it uses more digits than its factorization.

135191552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173 (or 102 counting only the distinct ones).

The product of its digits is 6750, while the sum is 32.

The square root of 135191552 is about 11627.1902022802. The cubic root of 135191552 is about 513.2352984580.

The spelling of 135191552 in words is "one hundred thirty-five million, one hundred ninety-one thousand, five hundred fifty-two".