135551320 has 64 divisors (see below), whose sum is σ = 326592000. Its totient is φ = 50479488.

The previous prime is 135551303. The next prime is 135551323. The reversal of 135551320 is 23155531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135551323) 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, 43329 + ... + 46351.

It is an arithmetic number, because the mean of its divisors is an integer number (5103000).

Almost surely, 2^135551320 is an apocalyptic number.

135551320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 135551320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163296000).

135551320 is an abundant number, since it is smaller than the sum of its proper divisors (191040680).

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

135551320 is a wasteful number, since it uses less digits than its factorization.

135551320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3112 (or 3108 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 135551320 is about 11642.6509008902. The cubic root of 135551320 is about 513.6901643737.

The spelling of 135551320 in words is "one hundred thirty-five million, five hundred fifty-one thousand, three hundred twenty".