5251121726 has 4 divisors (see below), whose sum is σ = 7876682592. Its totient is φ = 2625560862.

The previous prime is 5251121723. The next prime is 5251121737. The reversal of 5251121726 is 6271211525.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 5251121692 and 5251121701.

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 as a sum of consecutive naturals, namely, 1312780430 + ... + 1312780433.

It is an arithmetic number, because the mean of its divisors is an integer number (1969170648).

Almost surely, 2^5251121726 is an apocalyptic number.

5251121726 is a deficient number, since it is larger than the sum of its proper divisors (2625560866).

5251121726 is a wasteful number, since it uses less digits than its factorization.

5251121726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2625560865.

The product of its digits is 8400, while the sum is 32.

The square root of 5251121726 is about 72464.6239623170. The cubic root of 5251121726 is about 1738.1370961511.

The spelling of 5251121726 in words is "five billion, two hundred fifty-one million, one hundred twenty-one thousand, seven hundred twenty-six".