135621528 has 64 divisors (see below), whose sum is σ = 400005120. Its totient is φ = 37497600.

The previous prime is 135621511. The next prime is 135621533. The reversal of 135621528 is 825126531.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7813 + ... + 18228.

It is an arithmetic number, because the mean of its divisors is an integer number (6250080).

Almost surely, 2^135621528 is an apocalyptic number.

It is an amenable number.

135621528 is an abundant number, since it is smaller than the sum of its proper divisors (264383592).

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

135621528 is a wasteful number, since it uses less digits than its factorization.

135621528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26088 (or 26084 counting only the distinct ones).

The product of its digits is 14400, while the sum is 33.

The square root of 135621528 is about 11645.6656314699. The cubic root of 135621528 is about 513.7788366549.

The spelling of 135621528 in words is "one hundred thirty-five million, six hundred twenty-one thousand, five hundred twenty-eight".