5251243400 has 48 divisors (see below), whose sum is σ = 13148312100. Its totient is φ = 1938919680.

The previous prime is 5251243391. The next prime is 5251243429. The reversal of 5251243400 is 43421525.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 314494756 + 4936748644 = 17734^2 + 70262^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 5251243400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1007255 + ... + 1012454.

Almost surely, 2^5251243400 is an apocalyptic number.

5251243400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

5251243400 is an abundant number, since it is smaller than the sum of its proper divisors (7897068700).

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

5251243400 is a wasteful number, since it uses less digits than its factorization.

5251243400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2019738 (or 2019729 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 5251243400 is about 72465.4634981382. The cubic root of 5251243400 is about 1738.1505208675.

Adding to 5251243400 its reverse (43421525), we get a palindrome (5294664925).

The spelling of 5251243400 in words is "five billion, two hundred fifty-one million, two hundred forty-three thousand, four hundred".