5421224521 has 2 divisors, whose sum is σ = 5421224522. Its totient is φ = 5421224520.

The previous prime is 5421224491. The next prime is 5421224579. The reversal of 5421224521 is 1254221245.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2955009600 + 2466214921 = 54360^2 + 49661^2 .

It is a cyclic number.

It is not a de Polignac number, because 5421224521 - 2¹³ = 5421216329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5421224521.

It is not a weakly prime, because it can be changed into another prime (5421224581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2710612260 + 2710612261.

It is an arithmetic number, because the mean of its divisors is an integer number (2710612261).

Almost surely, 2^5421224521 is an apocalyptic number.

It is an amenable number.

5421224521 is a deficient number, since it is larger than the sum of its proper divisors (1).

5421224521 is an equidigital number, since it uses as much as digits as its factorization.

5421224521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6400, while the sum is 28.

The square root of 5421224521 is about 73628.9652310828. The cubic root of 5421224521 is about 1756.7061889857.

Adding to 5421224521 its reverse (1254221245), we get a palindrome (6675445766).

The spelling of 5421224521 in words is "five billion, four hundred twenty-one million, two hundred twenty-four thousand, five hundred twenty-one".