5251220124 has 48 divisors (see below), whose sum is σ = 12711972000. Its totient is φ = 1685166336.

The previous prime is 5251220119. The next prime is 5251220131. The reversal of 5251220124 is 4210221525.

It is a junction number, because it is equal to n+sod(n) for n = 5251220094 and 5251220103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99834 + ... + 143070.

It is an arithmetic number, because the mean of its divisors is an integer number (264832750).

Almost surely, 2^5251220124 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 5251220124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6355986000).

5251220124 is an abundant number, since it is smaller than the sum of its proper divisors (7460751876).

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

5251220124 is a wasteful number, since it uses less digits than its factorization.

5251220124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43622 (or 43620 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 5251220124 is about 72465.3028973177. The cubic root of 5251220124 is about 1738.1479527613.

Adding to 5251220124 its reverse (4210221525), we get a palindrome (9461441649).

The spelling of 5251220124 in words is "five billion, two hundred fifty-one million, two hundred twenty thousand, one hundred twenty-four".