5121421544 has 16 divisors (see below), whose sum is σ = 9697742820. Its totient is φ = 2535356800.

The previous prime is 5121421511. The next prime is 5121421567. The reversal of 5121421544 is 4451241215.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4223700100 + 897721444 = 64990^2 + 29962^2 .

It is an unprimeable number.

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, 3168389 + ... + 3170004.

Almost surely, 2^5121421544 is an apocalyptic number.

It is an amenable number.

5121421544 is a deficient number, since it is larger than the sum of its proper divisors (4576321276).

5121421544 is a wasteful number, since it uses less digits than its factorization.

5121421544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6338500 (or 6338496 counting only the distinct ones).

The product of its digits is 6400, while the sum is 29.

The square root of 5121421544 is about 71564.1079312807. The cubic root of 5121421544 is about 1723.7072489166.

Adding to 5121421544 its reverse (4451241215), we get a palindrome (9572662759).

The spelling of 5121421544 in words is "five billion, one hundred twenty-one million, four hundred twenty-one thousand, five hundred forty-four".