5423521613 has 4 divisors (see below), whose sum is σ = 5463109500. Its totient is φ = 5383933728.

The previous prime is 5423521589. The next prime is 5423521627. The reversal of 5423521613 is 3161253245.

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 4116120649 + 1307400964 = 64157^2 + 36158^2 .

It is a cyclic number.

It is not a de Polignac number, because 5423521613 - 2⁶ = 5423521549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 5423521613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5423551613) 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, 19793738 + ... + 19794011.

It is an arithmetic number, because the mean of its divisors is an integer number (1365777375).

Almost surely, 2^5423521613 is an apocalyptic number.

It is an amenable number.

5423521613 is a deficient number, since it is larger than the sum of its proper divisors (39587887).

5423521613 is a wasteful number, since it uses less digits than its factorization.

5423521613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39587886.

The product of its digits is 21600, while the sum is 32.

The square root of 5423521613 is about 73644.5626845594. The cubic root of 5423521613 is about 1756.9542722924.

Adding to 5423521613 its reverse (3161253245), we get a palindrome (8584774858).

The spelling of 5423521613 in words is "five billion, four hundred twenty-three million, five hundred twenty-one thousand, six hundred thirteen".