51662251097 has 2 divisors, whose sum is σ = 51662251098. Its totient is φ = 51662251096.

The previous prime is 51662251049. The next prime is 51662251153. The reversal of 51662251097 is 79015226615.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50288511001 + 1373740096 = 224251^2 + 37064^2 .

It is a cyclic number.

It is not a de Polignac number, because 51662251097 - 2⁸ = 51662250841 is a prime.

It is not a weakly prime, because it can be changed into another prime (51662251897) 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, 25831125548 + 25831125549.

It is an arithmetic number, because the mean of its divisors is an integer number (25831125549).

Almost surely, 2^51662251097 is an apocalyptic number.

It is an amenable number.

51662251097 is a deficient number, since it is larger than the sum of its proper divisors (1).

51662251097 is an equidigital number, since it uses as much as digits as its factorization.

51662251097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 51662251097 in words is "fifty-one billion, six hundred sixty-two million, two hundred fifty-one thousand, ninety-seven".