51270397 has 2 divisors, whose sum is σ = 51270398. Its totient is φ = 51270396.

The previous prime is 51270367. The next prime is 51270403. The reversal of 51270397 is 79307215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30239001 + 21031396 = 5499^2 + 4586^2 .

It is a cyclic number.

It is not a de Polignac number, because 51270397 - 2⁷ = 51270269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51270367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25635198 + 25635199.

It is an arithmetic number, because the mean of its divisors is an integer number (25635199).

Almost surely, 2^51270397 is an apocalyptic number.

It is an amenable number.

51270397 is a deficient number, since it is larger than the sum of its proper divisors (1).

51270397 is an equidigital number, since it uses as much as digits as its factorization.

51270397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 51270397 is about 7160.3349781976. The cubic root of 51270397 is about 371.4972130888.

The spelling of 51270397 in words is "fifty-one million, two hundred seventy thousand, three hundred ninety-seven".