51097901 has 2 divisors, whose sum is σ = 51097902. Its totient is φ = 51097900.

The previous prime is 51097853. The next prime is 51097933. The reversal of 51097901 is 10979015.

51097901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (51097933) can be obtained adding 51097901 to its sum of digits (32).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35880100 + 15217801 = 5990^2 + 3901^2 .

It is a cyclic number.

It is not a de Polignac number, because 51097901 - 2¹⁴ = 51081517 is a prime.

It is a super-2 number, since 2×51097901² = 5221990973211602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51093901) 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, 25548950 + 25548951.

It is an arithmetic number, because the mean of its divisors is an integer number (25548951).

Almost surely, 2^51097901 is an apocalyptic number.

It is an amenable number.

51097901 is a deficient number, since it is larger than the sum of its proper divisors (1).

51097901 is an equidigital number, since it uses as much as digits as its factorization.

51097901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2835, while the sum is 32.

The square root of 51097901 is about 7148.2795832284. The cubic root of 51097901 is about 371.0801187028.

The spelling of 51097901 in words is "fifty-one million, ninety-seven thousand, nine hundred one".