51397277 has 2 divisors, whose sum is σ = 51397278. Its totient is φ = 51397276.

The previous prime is 51397267. The next prime is 51397289. The reversal of 51397277 is 77279315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47045881 + 4351396 = 6859^2 + 2086^2 .

It is a cyclic number.

It is not a de Polignac number, because 51397277 - 2¹⁶ = 51331741 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51397207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25698638 + 25698639.

It is an arithmetic number, because the mean of its divisors is an integer number (25698639).

Almost surely, 2^51397277 is an apocalyptic number.

It is an amenable number.

51397277 is a deficient number, since it is larger than the sum of its proper divisors (1).

51397277 is an equidigital number, since it uses as much as digits as its factorization.

51397277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92610, while the sum is 41.

The square root of 51397277 is about 7169.1894241957. The cubic root of 51397277 is about 371.8034114673.

The spelling of 51397277 in words is "fifty-one million, three hundred ninety-seven thousand, two hundred seventy-seven".