51146287 has 2 divisors, whose sum is σ = 51146288. Its totient is φ = 51146286.

The previous prime is 51146281. The next prime is 51146297. The reversal of 51146287 is 78264115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51146287 - 2¹⁹ = 50621999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51146281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25573143 + 25573144.

It is an arithmetic number, because the mean of its divisors is an integer number (25573144).

Almost surely, 2^51146287 is an apocalyptic number.

51146287 is a deficient number, since it is larger than the sum of its proper divisors (1).

51146287 is an equidigital number, since it uses as much as digits as its factorization.

51146287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 34.

The square root of 51146287 is about 7151.6632331228. The cubic root of 51146287 is about 371.1972103894.

The spelling of 51146287 in words is "fifty-one million, one hundred forty-six thousand, two hundred eighty-seven".