135621524 has 24 divisors (see below), whose sum is σ = 248579520. Its totient is φ = 64620864.

The previous prime is 135621511. The next prime is 135621533. The reversal of 135621524 is 425126531.

It is a congruent number.

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, 23432 + ... + 28640.

It is an arithmetic number, because the mean of its divisors is an integer number (10357480).

Almost surely, 2^135621524 is an apocalyptic number.

It is an amenable number.

135621524 is a deficient number, since it is larger than the sum of its proper divisors (112957996).

135621524 is a wasteful number, since it uses less digits than its factorization.

135621524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5519 (or 5517 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 135621524 is about 11645.6654597322. The cubic root of 135621524 is about 513.7788316038.

The spelling of 135621524 in words is "one hundred thirty-five million, six hundred twenty-one thousand, five hundred twenty-four".