5251948109 has 4 divisors (see below), whose sum is σ = 5259055680. Its totient is φ = 5244840540.

The previous prime is 5251948073. The next prime is 5251948139. The reversal of 5251948109 is 9018491525.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5251948109 - 2¹² = 5251944013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5251948109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5251948139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3552677 + ... + 3554154.

It is an arithmetic number, because the mean of its divisors is an integer number (1314763920).

Almost surely, 2^5251948109 is an apocalyptic number.

It is an amenable number.

5251948109 is a deficient number, since it is larger than the sum of its proper divisors (7107571).

5251948109 is an equidigital number, since it uses as much as digits as its factorization.

5251948109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7107570.

The product of its (nonzero) digits is 129600, while the sum is 44.

The square root of 5251948109 is about 72470.3257133566. The cubic root of 5251948109 is about 1738.2282697886.

The spelling of 5251948109 in words is "five billion, two hundred fifty-one million, nine hundred forty-eight thousand, one hundred nine".