128553225 has 24 divisors (see below), whose sum is σ = 217069440. Its totient is φ = 67101120.

The previous prime is 128553223. The next prime is 128553241. The reversal of 128553225 is 522355821.

It is not a de Polignac number, because 128553225 - 2¹ = 128553223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128553223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14710 + ... + 21759.

It is an arithmetic number, because the mean of its divisors is an integer number (9044560).

Almost surely, 2^128553225 is an apocalyptic number.

128553225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128553225 is a deficient number, since it is larger than the sum of its proper divisors (88516215).

128553225 is a wasteful number, since it uses less digits than its factorization.

128553225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36529 (or 36524 counting only the distinct ones).

The product of its digits is 24000, while the sum is 33.

The square root of 128553225 is about 11338.1314598129. The cubic root of 128553225 is about 504.6934387471.

It can be divided in two parts, 128553 and 225, that added together give a triangular number (128778 = T₅₀₇).

The spelling of 128553225 in words is "one hundred twenty-eight million, five hundred fifty-three thousand, two hundred twenty-five".