5251421040 has 160 divisors (see below), whose sum is σ = 17657994816. Its totient is φ = 1285816320.

The previous prime is 5251421029. The next prime is 5251421069. The reversal of 5251421040 is 401241525.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 5251421040.

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, 151584 + ... + 182976.

Almost surely, 2^5251421040 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 5251421040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8828997408).

5251421040 is an abundant number, since it is smaller than the sum of its proper divisors (12406573776).

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

5251421040 is a wasteful number, since it uses less digits than its factorization.

5251421040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31467 (or 31461 counting only the distinct ones).

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

The square root of 5251421040 is about 72466.6891750962. The cubic root of 5251421040 is about 1738.1701201352.

Adding to 5251421040 its reverse (401241525), we get a palindrome (5652662565).

The spelling of 5251421040 in words is "five billion, two hundred fifty-one million, four hundred twenty-one thousand, forty".