51383251 has 2 divisors, whose sum is σ = 51383252. Its totient is φ = 51383250.

The previous prime is 51383243. The next prime is 51383263. The reversal of 51383251 is 15238315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51383251 - 2³ = 51383243 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51383221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25691625 + 25691626.

It is an arithmetic number, because the mean of its divisors is an integer number (25691626).

Almost surely, 2^51383251 is an apocalyptic number.

51383251 is a deficient number, since it is larger than the sum of its proper divisors (1).

51383251 is an equidigital number, since it uses as much as digits as its factorization.

51383251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 28.

The square root of 51383251 is about 7168.2111436536. The cubic root of 51383251 is about 371.7695874375.

The spelling of 51383251 in words is "fifty-one million, three hundred eighty-three thousand, two hundred fifty-one".