5251121725 has 12 divisors (see below), whose sum is σ = 6512708160. Its totient is φ = 4200047600.

The previous prime is 5251121723. The next prime is 5251121737. The reversal of 5251121725 is 5271211525.

It is a happy number.

It is not a de Polignac number, because 5251121725 - 2¹ = 5251121723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5251121723) by changing a digit.

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, 124386 + ... + 161164.

It is an arithmetic number, because the mean of its divisors is an integer number (542725680).

Almost surely, 2^5251121725 is an apocalyptic number.

It is an amenable number.

5251121725 is a deficient number, since it is larger than the sum of its proper divisors (1261586435).

5251121725 is a wasteful number, since it uses less digits than its factorization.

5251121725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42500 (or 42495 counting only the distinct ones).

The product of its digits is 7000, while the sum is 31.

The square root of 5251121725 is about 72464.6239554170. The cubic root of 5251121725 is about 1738.1370960407.

The spelling of 5251121725 in words is "five billion, two hundred fifty-one million, one hundred twenty-one thousand, seven hundred twenty-five".