2021540255 has 16 divisors (see below), whose sum is σ = 2793567744. Its totient is φ = 1375614240.

The previous prime is 2021540249. The next prime is 2021540263. The reversal of 2021540255 is 5520451202.

It is not a de Polignac number, because 2021540255 - 2⁴ = 2021540239 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 215867 + ... + 225036.

It is an arithmetic number, because the mean of its divisors is an integer number (174597984).

Almost surely, 2^2021540255 is an apocalyptic number.

2021540255 is a deficient number, since it is larger than the sum of its proper divisors (772027489).

2021540255 is a wasteful number, since it uses less digits than its factorization.

2021540255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441046.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 2021540255 is about 44961.5419553200. The cubic root of 2021540255 is about 1264.4280781063.

Adding to 2021540255 its reverse (5520451202), we get a palindrome (7541991457).

The spelling of 2021540255 in words is "two billion, twenty-one million, five hundred forty thousand, two hundred fifty-five".