51499457 has 2 divisors, whose sum is σ = 51499458. Its totient is φ = 51499456.

The previous prime is 51499429. The next prime is 51499471. The reversal of 51499457 is 75499415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42523441 + 8976016 = 6521^2 + 2996^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51499457 is a prime.

It is not a weakly prime, because it can be changed into another prime (51499057) 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, 25749728 + 25749729.

It is an arithmetic number, because the mean of its divisors is an integer number (25749729).

Almost surely, 2^51499457 is an apocalyptic number.

It is an amenable number.

51499457 is a deficient number, since it is larger than the sum of its proper divisors (1).

51499457 is an equidigital number, since it uses as much as digits as its factorization.

51499457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 44.

The square root of 51499457 is about 7176.3122145013. The cubic root of 51499457 is about 372.0496354357.

The spelling of 51499457 in words is "fifty-one million, four hundred ninety-nine thousand, four hundred fifty-seven".