2045054022521 has 4 divisors (see below), whose sum is σ = 2045060300544. Its totient is φ = 2045047744500.

The previous prime is 2045054022499. The next prime is 2045054022527. The reversal of 2045054022521 is 1252204505402.

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 2045054022521 - 2²⁶ = 2044986913657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2045054022527) 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, 2622005 + ... + 3311346.

It is an arithmetic number, because the mean of its divisors is an integer number (511265075136).

Almost surely, 2^{2045054022521} is an apocalyptic number.

It is an amenable number.

2045054022521 is a deficient number, since it is larger than the sum of its proper divisors (6278023).

2045054022521 is an equidigital number, since it uses as much as digits as its factorization.

2045054022521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6278022.

The product of its (nonzero) digits is 32000, while the sum is 32.

Adding to 2045054022521 its reverse (1252204505402), we get a palindrome (3297258527923).

The spelling of 2045054022521 in words is "two trillion, forty-five billion, fifty-four million, twenty-two thousand, five hundred twenty-one".