101728215 has 12 divisors (see below), whose sum is σ = 176328984. Its totient is φ = 54255024.

The previous prime is 101728183. The next prime is 101728219. The reversal of 101728215 is 512827101.

It is not a de Polignac number, because 101728215 - 2⁵ = 101728183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101728219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1130269 + ... + 1130358.

It is an arithmetic number, because the mean of its divisors is an integer number (14694082).

Almost surely, 2^101728215 is an apocalyptic number.

101728215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

101728215 is a deficient number, since it is larger than the sum of its proper divisors (74600769).

101728215 is a wasteful number, since it uses less digits than its factorization.

101728215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2260638 (or 2260635 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

The square root of 101728215 is about 10086.0406007511. The cubic root of 101728215 is about 466.8175138760.

The spelling of 101728215 in words is "one hundred one million, seven hundred twenty-eight thousand, two hundred fifteen".