2100521255 has 16 divisors (see below), whose sum is σ = 2915426304. Its totient is φ = 1423001760.

The previous prime is 2100521237. The next prime is 2100521263. The reversal of 2100521255 is 5521250012.

It is not a de Polignac number, because 2100521255 - 2²² = 2096326951 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2100521255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 358631 + ... + 364440.

It is an arithmetic number, because the mean of its divisors is an integer number (182214144).

Almost surely, 2^2100521255 is an apocalyptic number.

2100521255 is a deficient number, since it is larger than the sum of its proper divisors (814905049).

2100521255 is an equidigital number, since it uses as much as digits as its factorization.

2100521255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723166.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 2100521255 is about 45831.4439549967. The cubic root of 2100521255 is about 1280.6851099195.

Adding to 2100521255 its reverse (5521250012), we get a palindrome (7621771267).

The spelling of 2100521255 in words is "two billion, one hundred million, five hundred twenty-one thousand, two hundred fifty-five".