51061957 has 2 divisors, whose sum is σ = 51061958. Its totient is φ = 51061956.

The previous prime is 51061951. The next prime is 51062003. The reversal of 51061957 is 75916015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39765636 + 11296321 = 6306^2 + 3361^2 .

It is a cyclic number.

It is not a de Polignac number, because 51061957 - 2¹¹ = 51059909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51061951) 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, 25530978 + 25530979.

It is an arithmetic number, because the mean of its divisors is an integer number (25530979).

Almost surely, 2^51061957 is an apocalyptic number.

It is an amenable number.

51061957 is a deficient number, since it is larger than the sum of its proper divisors (1).

51061957 is an equidigital number, since it uses as much as digits as its factorization.

51061957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 34.

The square root of 51061957 is about 7145.7649695466. The cubic root of 51061957 is about 370.9930881710.

The spelling of 51061957 in words is "fifty-one million, sixty-one thousand, nine hundred fifty-seven".