51314987 has 2 divisors, whose sum is σ = 51314988. Its totient is φ = 51314986.

The previous prime is 51314983. The next prime is 51315031. The reversal of 51314987 is 78941315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51314987 - 2² = 51314983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51314987.

It is not a weakly prime, because it can be changed into another prime (51314981) 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, 25657493 + 25657494.

It is an arithmetic number, because the mean of its divisors is an integer number (25657494).

Almost surely, 2^51314987 is an apocalyptic number.

51314987 is a deficient number, since it is larger than the sum of its proper divisors (1).

51314987 is an equidigital number, since it uses as much as digits as its factorization.

51314987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 38.

The square root of 51314987 is about 7163.4479826408. The cubic root of 51314987 is about 371.6048792522.

The spelling of 51314987 in words is "fifty-one million, three hundred fourteen thousand, nine hundred eighty-seven".