6451000251 has 16 divisors (see below), whose sum is σ = 9586627200. Its totient is φ = 3834649728.

The previous prime is 6451000247. The next prime is 6451000253. The reversal of 6451000251 is 1520001546.

It is not a de Polignac number, because 6451000251 - 2² = 6451000247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6451000253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3327721 + ... + 3329658.

It is an arithmetic number, because the mean of its divisors is an integer number (599164200).

Almost surely, 2^6451000251 is an apocalyptic number.

6451000251 is a deficient number, since it is larger than the sum of its proper divisors (3135626949).

6451000251 is a wasteful number, since it uses less digits than its factorization.

6451000251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6657418.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 6451000251 is about 80318.1190703567. The cubic root of 6451000251 is about 1861.5542036154.

Adding to 6451000251 its reverse (1520001546), we get a palindrome (7971001797).

The spelling of 6451000251 in words is "six billion, four hundred fifty-one million, two hundred fifty-one", and thus it is an aban number.