651051551 has 2 divisors, whose sum is σ = 651051552. Its totient is φ = 651051550.

The previous prime is 651051539. The next prime is 651051559. The reversal of 651051551 is 155150156.

It is a happy number.

651051551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 651051551 - 2¹⁴ = 651035167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (651051559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325525775 + 325525776.

It is an arithmetic number, because the mean of its divisors is an integer number (325525776).

Almost surely, 2^651051551 is an apocalyptic number.

651051551 is a deficient number, since it is larger than the sum of its proper divisors (1).

651051551 is an equidigital number, since it uses as much as digits as its factorization.

651051551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3750, while the sum is 29.

The square root of 651051551 is about 25515.7118458412. The cubic root of 651051551 is about 866.7059791010.

The spelling of 651051551 in words is "six hundred fifty-one million, fifty-one thousand, five hundred fifty-one".