651266101 has 2 divisors, whose sum is σ = 651266102. Its totient is φ = 651266100.

The previous prime is 651266087. The next prime is 651266167. The reversal of 651266101 is 101662156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 331786225 + 319479876 = 18215^2 + 17874^2 .

It is a cyclic number.

It is not a de Polignac number, because 651266101 - 2¹⁷ = 651135029 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 651266101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (651266191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325633050 + 325633051.

It is an arithmetic number, because the mean of its divisors is an integer number (325633051).

Almost surely, 2^651266101 is an apocalyptic number.

It is an amenable number.

651266101 is a deficient number, since it is larger than the sum of its proper divisors (1).

651266101 is an equidigital number, since it uses as much as digits as its factorization.

651266101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 651266101 is about 25519.9157718046. The cubic root of 651266101 is about 866.8011745044.

The spelling of 651266101 in words is "six hundred fifty-one million, two hundred sixty-six thousand, one hundred one".