215450128 has 20 divisors (see below), whose sum is σ = 419772240. Its totient is φ = 107121824.

The previous prime is 215450111. The next prime is 215450153. The reversal of 215450128 is 821054512.

It is a junction number, because it is equal to n+sod(n) for n = 215450096 and 215450105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34750 + ... + 40477.

It is an arithmetic number, because the mean of its divisors is an integer number (20988612).

Almost surely, 2^215450128 is an apocalyptic number.

It is an amenable number.

215450128 is a deficient number, since it is larger than the sum of its proper divisors (204322112).

215450128 is a wasteful number, since it uses less digits than its factorization.

215450128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75414 (or 75408 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 215450128 is about 14678.2195105537. The cubic root of 215450128 is about 599.4904266067.

The spelling of 215450128 in words is "two hundred fifteen million, four hundred fifty thousand, one hundred twenty-eight".