5421212500 has 144 divisors (see below), whose sum is σ = 13111035840. Its totient is φ = 1944800000.

The previous prime is 5421212491. The next prime is 5421212521. The reversal of 5421212500 is 52121245.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12237279 + ... + 12237721.

It is an arithmetic number, because the mean of its divisors is an integer number (91048860).

Almost surely, 2^5421212500 is an apocalyptic number.

5421212500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5421212500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6555517920).

5421212500 is an abundant number, since it is smaller than the sum of its proper divisors (7689823340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5421212500 is a wasteful number, since it uses less digits than its factorization.

5421212500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572 (or 550 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 5421212500 is about 73628.8835987617. The cubic root of 5421212500 is about 1756.7048905472.

Adding to 5421212500 its reverse (52121245), we get a palindrome (5473333745).

The spelling of 5421212500 in words is "five billion, four hundred twenty-one million, two hundred twelve thousand, five hundred".