51686053 has 2 divisors, whose sum is σ = 51686054. Its totient is φ = 51686052.

The previous prime is 51686039. The next prime is 51686057. The reversal of 51686053 is 35068615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38962564 + 12723489 = 6242^2 + 3567^2 .

It is a cyclic number.

It is not a de Polignac number, because 51686053 - 2¹³ = 51677861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51686057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25843026 + 25843027.

It is an arithmetic number, because the mean of its divisors is an integer number (25843027).

Almost surely, 2^51686053 is an apocalyptic number.

It is an amenable number.

51686053 is a deficient number, since it is larger than the sum of its proper divisors (1).

51686053 is an equidigital number, since it uses as much as digits as its factorization.

51686053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 51686053 is about 7189.3012873297. The cubic root of 51686053 is about 372.4984382019.

The spelling of 51686053 in words is "fifty-one million, six hundred eighty-six thousand, fifty-three".