651631117 has 2 divisors, whose sum is σ = 651631118. Its totient is φ = 651631116.

The previous prime is 651631051. The next prime is 651631217. The reversal of 651631117 is 711136156.

651631117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 514881481 + 136749636 = 22691^2 + 11694^2 .

It is a cyclic number.

It is not a de Polignac number, because 651631117 - 2¹⁹ = 651106829 is a prime.

It is a super-2 number, since 2×651631117² = 849246225285335378, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (651631217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325815558 + 325815559.

It is an arithmetic number, because the mean of its divisors is an integer number (325815559).

Almost surely, 2^651631117 is an apocalyptic number.

It is an amenable number.

651631117 is a deficient number, since it is larger than the sum of its proper divisors (1).

651631117 is an equidigital number, since it uses as much as digits as its factorization.

651631117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 31.

The square root of 651631117 is about 25527.0663610216. The cubic root of 651631117 is about 866.9630833387.

The spelling of 651631117 in words is "six hundred fifty-one million, six hundred thirty-one thousand, one hundred seventeen".