128316550 has 24 divisors (see below), whose sum is σ = 242587152. Its totient is φ = 50484000.

The previous prime is 128316523. The next prime is 128316577. The reversal of 128316550 is 55613821.

It is an interprime number because it is at equal distance from previous prime (128316523) and next prime (128316577).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17986 + ... + 24085.

It is an arithmetic number, because the mean of its divisors is an integer number (10107798).

Almost surely, 2^128316550 is an apocalyptic number.

128316550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128316550 is a deficient number, since it is larger than the sum of its proper divisors (114270602).

128316550 is a wasteful number, since it uses less digits than its factorization.

128316550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42144 (or 42139 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 128316550 is about 11327.6895261126. The cubic root of 128316550 is about 504.3835237974.

The spelling of 128316550 in words is "one hundred twenty-eight million, three hundred sixteen thousand, five hundred fifty".