135621500 has 48 divisors (see below), whose sum is σ = 338520000. Its totient is φ = 46497600.

The previous prime is 135621491. The next prime is 135621503. The reversal of 135621500 is 5126531.

135621500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135621503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15875 + ... + 22874.

It is an arithmetic number, because the mean of its divisors is an integer number (7052500).

Almost surely, 2^135621500 is an apocalyptic number.

135621500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135621500 is an abundant number, since it is smaller than the sum of its proper divisors (202898500).

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

135621500 is a wasteful number, since it uses less digits than its factorization.

135621500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38775 (or 38763 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 135621500 is about 11645.6644293059. The cubic root of 135621500 is about 513.7788012972.

The spelling of 135621500 in words is "one hundred thirty-five million, six hundred twenty-one thousand, five hundred".