13540021255 has 4 divisors (see below), whose sum is σ = 16248025512. Its totient is φ = 10832017000.

The previous prime is 13540021241. The next prime is 13540021279. The reversal of 13540021255 is 55212004531.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13540021255 - 2²⁵ = 13506466823 is a prime.

It is a super-3 number, since 3×13540021255³ (a number of 31 digits) contains 333 as substring.

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 3 ways as a sum of consecutive naturals, for example, 1354002121 + ... + 1354002130.

It is an arithmetic number, because the mean of its divisors is an integer number (4062006378).

Almost surely, 2^13540021255 is an apocalyptic number.

13540021255 is a deficient number, since it is larger than the sum of its proper divisors (2708004257).

13540021255 is an equidigital number, since it uses as much as digits as its factorization.

13540021255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2708004256.

The product of its (nonzero) digits is 6000, while the sum is 28.

Adding to 13540021255 its reverse (55212004531), we get a palindrome (68752025786).

The spelling of 13540021255 in words is "thirteen billion, five hundred forty million, twenty-one thousand, two hundred fifty-five".