2015449853 has 4 divisors (see below), whose sum is σ = 2049610080. Its totient is φ = 1981289628.

The previous prime is 2015449837. The next prime is 2015449867. The reversal of 2015449853 is 3589445102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3589445102 = 2 ⋅1794722551.

It is a cyclic number.

It is not a de Polignac number, because 2015449853 - 2⁴ = 2015449837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2015449853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2015449153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17080025 + ... + 17080142.

It is an arithmetic number, because the mean of its divisors is an integer number (512402520).

Almost surely, 2^2015449853 is an apocalyptic number.

It is an amenable number.

2015449853 is a deficient number, since it is larger than the sum of its proper divisors (34160227).

2015449853 is an equidigital number, since it uses as much as digits as its factorization.

2015449853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34160226.

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 2015449853 is about 44893.7618495042. The cubic root of 2015449853 is about 1263.1569974935.

It can be divided in two parts, 20154 and 49853, that added together give a palindrome (70007).

The spelling of 2015449853 in words is "two billion, fifteen million, four hundred forty-nine thousand, eight hundred fifty-three".