2015320453 has 4 divisors (see below), whose sum is σ = 2016328608. Its totient is φ = 2014312300.

The previous prime is 2015320397. The next prime is 2015320457. The reversal of 2015320453 is 3540235102.

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.

It is a cyclic number.

It is not a de Polignac number, because 2015320453 - 2²¹ = 2013223301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2015320457) 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, 501073 + ... + 505078.

It is an arithmetic number, because the mean of its divisors is an integer number (504082152).

Almost surely, 2^2015320453 is an apocalyptic number.

It is an amenable number.

2015320453 is a deficient number, since it is larger than the sum of its proper divisors (1008155).

2015320453 is a wasteful number, since it uses less digits than its factorization.

2015320453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008154.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 2015320453 is about 44892.3206461862. The cubic root of 2015320453 is about 1263.1299636589.

Adding to 2015320453 its reverse (3540235102), we get a palindrome (5555555555).

The spelling of 2015320453 in words is "two billion, fifteen million, three hundred twenty thousand, four hundred fifty-three".