5211423644 has 96 divisors (see below), whose sum is σ = 11302695936. Its totient is φ = 2051712000.

The previous prime is 5211423631. The next prime is 5211423653. The reversal of 5211423644 is 4463241125.

It is a self number, because there is not a number n which added to its sum of digits gives 5211423644.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 6331817 + ... + 6332639.

It is an arithmetic number, because the mean of its divisors is an integer number (117736416).

Almost surely, 2^5211423644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5211423644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5651347968).

5211423644 is an abundant number, since it is smaller than the sum of its proper divisors (6091272292).

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

5211423644 is a wasteful number, since it uses less digits than its factorization.

5211423644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155 (or 1153 counting only the distinct ones).

The product of its digits is 23040, while the sum is 32.

The square root of 5211423644 is about 72190.1907740934. The cubic root of 5211423644 is about 1733.7459503723.

Adding to 5211423644 its reverse (4463241125), we get a palindrome (9674664769).

The spelling of 5211423644 in words is "five billion, two hundred eleven million, four hundred twenty-three thousand, six hundred forty-four".