128310215 has 24 divisors (see below), whose sum is σ = 176619744. Its totient is φ = 89249600.

The previous prime is 128310163. The next prime is 128310223. The reversal of 128310215 is 512013821.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-128310215 is a prime.

It is a super-2 number, since 2×128310215² = 32927022546692450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9305 + ... + 18525.

It is an arithmetic number, because the mean of its divisors is an integer number (7359156).

Almost surely, 2^128310215 is an apocalyptic number.

128310215 is a deficient number, since it is larger than the sum of its proper divisors (48309529).

128310215 is a wasteful number, since it uses less digits than its factorization.

128310215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9271 (or 9260 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 128310215 is about 11327.4098981188. The cubic root of 128310215 is about 504.3752231736.

The spelling of 128310215 in words is "one hundred twenty-eight million, three hundred ten thousand, two hundred fifteen".