51054251 has 2 divisors, whose sum is σ = 51054252. Its totient is φ = 51054250.

The previous prime is 51054233. The next prime is 51054271. The reversal of 51054251 is 15245015.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51054251 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51054221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25527125 + 25527126.

It is an arithmetic number, because the mean of its divisors is an integer number (25527126).

Almost surely, 2^51054251 is an apocalyptic number.

51054251 is a deficient number, since it is larger than the sum of its proper divisors (1).

51054251 is an equidigital number, since it uses as much as digits as its factorization.

51054251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 51054251 is about 7145.2257487080. The cubic root of 51054251 is about 370.9744244617.

Adding to 51054251 its reverse (15245015), we get a palindrome (66299266).

The spelling of 51054251 in words is "fifty-one million, fifty-four thousand, two hundred fifty-one".