51404331197 has 2 divisors, whose sum is σ = 51404331198. Its totient is φ = 51404331196.

The previous prime is 51404331169. The next prime is 51404331211. The reversal of 51404331197 is 79113340415.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35637510841 + 15766820356 = 188779^2 + 125566^2 .

It is a cyclic number.

It is not a de Polignac number, because 51404331197 - 2¹⁸ = 51404069053 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51404331197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51404331497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25702165598 + 25702165599.

It is an arithmetic number, because the mean of its divisors is an integer number (25702165599).

Almost surely, 2^51404331197 is an apocalyptic number.

It is an amenable number.

51404331197 is a deficient number, since it is larger than the sum of its proper divisors (1).

51404331197 is an equidigital number, since it uses as much as digits as its factorization.

51404331197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 38.

The spelling of 51404331197 in words is "fifty-one billion, four hundred four million, three hundred thirty-one thousand, one hundred ninety-seven".