51140251 has 2 divisors, whose sum is σ = 51140252. Its totient is φ = 51140250.

The previous prime is 51140249. The next prime is 51140263. The reversal of 51140251 is 15204115.

51140251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51140251 - 2¹ = 51140249 is a prime.

Together with 51140249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51140231) 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, 25570125 + 25570126.

It is an arithmetic number, because the mean of its divisors is an integer number (25570126).

Almost surely, 2^51140251 is an apocalyptic number.

51140251 is a deficient number, since it is larger than the sum of its proper divisors (1).

51140251 is an equidigital number, since it uses as much as digits as its factorization.

51140251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 51140251 is about 7151.2412209350. The cubic root of 51140251 is about 371.1826076056.

Adding to 51140251 its reverse (15204115), we get a palindrome (66344366).

The spelling of 51140251 in words is "fifty-one million, one hundred forty thousand, two hundred fifty-one".