2421544521 has 16 divisors (see below), whose sum is σ = 3523716288. Its totient is φ = 1466990400.

The previous prime is 2421544451. The next prime is 2421544529. The reversal of 2421544521 is 1254451242.

It is not a de Polignac number, because 2421544521 - 2¹⁰ = 2421543497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2421544529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72495 + ... + 100491.

It is an arithmetic number, because the mean of its divisors is an integer number (220232268).

Almost surely, 2^2421544521 is an apocalyptic number.

It is an amenable number.

2421544521 is a deficient number, since it is larger than the sum of its proper divisors (1102171767).

2421544521 is a wasteful number, since it uses less digits than its factorization.

2421544521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30632.

The product of its digits is 12800, while the sum is 30.

The square root of 2421544521 is about 49209.1914280249. The cubic root of 2421544521 is about 1342.8602528022.

Adding to 2421544521 its reverse (1254451242), we get a palindrome (3675995763).

The spelling of 2421544521 in words is "two billion, four hundred twenty-one million, five hundred forty-four thousand, five hundred twenty-one".