255100215 has 16 divisors (see below), whose sum is σ = 432170208. Its totient is φ = 128050176.

The previous prime is 255100171. The next prime is 255100217. The reversal of 255100215 is 512001552.

It is not a de Polignac number, because 255100215 - 2⁸ = 255099959 is a prime.

It is a super-2 number, since 2×255100215² = 130152239386092450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 255100191 and 255100200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255100217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 499942 + ... + 500451.

It is an arithmetic number, because the mean of its divisors is an integer number (27010638).

Almost surely, 2^255100215 is an apocalyptic number.

255100215 is a deficient number, since it is larger than the sum of its proper divisors (177069993).

255100215 is a wasteful number, since it uses less digits than its factorization.

255100215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000418.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 255100215 is about 15971.8569678043. The cubic root of 255100215 is about 634.2156310253.

Adding to 255100215 its reverse (512001552), we get a palindrome (767101767).

The spelling of 255100215 in words is "two hundred fifty-five million, one hundred thousand, two hundred fifteen".