51285061 has 2 divisors, whose sum is σ = 51285062. Its totient is φ = 51285060.

The previous prime is 51285053. The next prime is 51285077. The reversal of 51285061 is 16058215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46662561 + 4622500 = 6831^2 + 2150^2 .

It is a cyclic number.

It is not a de Polignac number, because 51285061 - 2³ = 51285053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51285001) 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, 25642530 + 25642531.

It is an arithmetic number, because the mean of its divisors is an integer number (25642531).

Almost surely, 2^51285061 is an apocalyptic number.

It is an amenable number.

51285061 is a deficient number, since it is larger than the sum of its proper divisors (1).

51285061 is an equidigital number, since it uses as much as digits as its factorization.

51285061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 51285061 is about 7161.3588794306. The cubic root of 51285061 is about 371.5326273900.

The spelling of 51285061 in words is "fifty-one million, two hundred eighty-five thousand, sixty-one".