135221396 has 12 divisors (see below), whose sum is σ = 236955348. Its totient is φ = 67519872.

The previous prime is 135221381. The next prime is 135221441. The reversal of 135221396 is 693122531.

It can be written as a sum of positive squares in 2 ways, for example, as 76912900 + 58308496 = 8770^2 + 7636^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19301 + ... + 25356.

It is an arithmetic number, because the mean of its divisors is an integer number (19746279).

Almost surely, 2^135221396 is an apocalyptic number.

It is an amenable number.

135221396 is a deficient number, since it is larger than the sum of its proper divisors (101733952).

135221396 is a wasteful number, since it uses less digits than its factorization.

135221396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45418 (or 45416 counting only the distinct ones).

The product of its digits is 9720, while the sum is 32.

The square root of 135221396 is about 11628.4735025712. The cubic root of 135221396 is about 513.2730618317.

The spelling of 135221396 in words is "one hundred thirty-five million, two hundred twenty-one thousand, three hundred ninety-six".