51520499 has 2 divisors, whose sum is σ = 51520500. Its totient is φ = 51520498.

The previous prime is 51520459. The next prime is 51520583. The reversal of 51520499 is 99402515.

51520499 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 51520499 - 2¹² = 51516403 is a prime.

It is not a weakly prime, because it can be changed into another prime (51520439) 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, 25760249 + 25760250.

It is an arithmetic number, because the mean of its divisors is an integer number (25760250).

Almost surely, 2^51520499 is an apocalyptic number.

51520499 is a deficient number, since it is larger than the sum of its proper divisors (1).

51520499 is an equidigital number, since it uses as much as digits as its factorization.

51520499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 51520499 is about 7177.7781381149. The cubic root of 51520499 is about 372.1003000634.

The spelling of 51520499 in words is "fifty-one million, five hundred twenty thousand, four hundred ninety-nine".