6400305251 has 8 divisors (see below), whose sum is σ = 6577763520. Its totient is φ = 6223082688.

The previous prime is 6400305217. The next prime is 6400305269. The reversal of 6400305251 is 1525030046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6400305251 - 2¹⁰ = 6400304227 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 6400305251.

It is not an unprimeable number, because it can be changed into a prime (6400605251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3146 + ... + 113183.

It is an arithmetic number, because the mean of its divisors is an integer number (822220440).

Almost surely, 2^6400305251 is an apocalyptic number.

6400305251 is a deficient number, since it is larger than the sum of its proper divisors (177458269).

6400305251 is a wasteful number, since it uses less digits than its factorization.

6400305251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117853.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 6400305251 is about 80001.9077960020. The cubic root of 6400305251 is about 1856.6650506765.

Adding to 6400305251 its reverse (1525030046), we get a palindrome (7925335297).

The spelling of 6400305251 in words is "six billion, four hundred million, three hundred five thousand, two hundred fifty-one".