51898513 has 2 divisors, whose sum is σ = 51898514. Its totient is φ = 51898512.

The previous prime is 51898493. The next prime is 51898523. The reversal of 51898513 is 31589815.

51898513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51093904 + 804609 = 7148^2 + 897^2 .

It is a cyclic number.

It is not a de Polignac number, because 51898513 - 2⁹ = 51898001 is a prime.

It is a super-2 number, since 2×51898513² = 5386911303222338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51898523) 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, 25949256 + 25949257.

It is an arithmetic number, because the mean of its divisors is an integer number (25949257).

Almost surely, 2^51898513 is an apocalyptic number.

It is an amenable number.

51898513 is a deficient number, since it is larger than the sum of its proper divisors (1).

51898513 is an equidigital number, since it uses as much as digits as its factorization.

51898513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 40.

The square root of 51898513 is about 7204.0622568104. The cubic root of 51898513 is about 373.0081361564.

The spelling of 51898513 in words is "fifty-one million, eight hundred ninety-eight thousand, five hundred thirteen".