5423504021 has 4 divisors (see below), whose sum is σ = 5840696652. Its totient is φ = 5006311392.

The previous prime is 5423504017. The next prime is 5423504063. The reversal of 5423504021 is 1204053245.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3564687025 + 1858816996 = 59705^2 + 43114^2 .

It is a cyclic number.

It is not a de Polignac number, because 5423504021 - 2² = 5423504017 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 (5423504081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208596296 + ... + 208596321.

It is an arithmetic number, because the mean of its divisors is an integer number (1460174163).

Almost surely, 2^5423504021 is an apocalyptic number.

It is an amenable number.

5423504021 is a deficient number, since it is larger than the sum of its proper divisors (417192631).

5423504021 is a wasteful number, since it uses less digits than its factorization.

5423504021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417192630.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 5423504021 is about 73644.4432459096. The cubic root of 5423504021 is about 1756.9523726428.

Adding to 5423504021 its reverse (1204053245), we get a palindrome (6627557266).

The spelling of 5423504021 in words is "five billion, four hundred twenty-three million, five hundred four thousand, twenty-one".