651120517 has 2 divisors, whose sum is σ = 651120518. Its totient is φ = 651120516.

The previous prime is 651120511. The next prime is 651120571. The reversal of 651120517 is 715021156.

Together with next prime (651120571) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 627051681 + 24068836 = 25041^2 + 4906^2 .

It is a cyclic number.

It is not a de Polignac number, because 651120517 - 2⁷ = 651120389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (651120511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325560258 + 325560259.

It is an arithmetic number, because the mean of its divisors is an integer number (325560259).

Almost surely, 2^651120517 is an apocalyptic number.

It is an amenable number.

651120517 is a deficient number, since it is larger than the sum of its proper divisors (1).

651120517 is an equidigital number, since it uses as much as digits as its factorization.

651120517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100, while the sum is 28.

The square root of 651120517 is about 25517.0632518713. The cubic root of 651120517 is about 866.7365814571.

It can be divided in two parts, 6511 and 20517, that added together give a triangular number (27028 = T₂₃₂).

The spelling of 651120517 in words is "six hundred fifty-one million, one hundred twenty thousand, five hundred seventeen".