51860869 has 2 divisors, whose sum is σ = 51860870. Its totient is φ = 51860868.

The previous prime is 51860857. The next prime is 51860909. The reversal of 51860869 is 96806815.

51860869 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 can be written as a sum of positive squares in only one way, i.e., 36360900 + 15499969 = 6030^2 + 3937^2 .

It is a cyclic number.

It is not a de Polignac number, because 51860869 - 2⁷ = 51860741 is a prime.

It is a super-2 number, since 2×51860869² = 5379099466870322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51860819) 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, 25930434 + 25930435.

It is an arithmetic number, because the mean of its divisors is an integer number (25930435).

Almost surely, 2^51860869 is an apocalyptic number.

It is an amenable number.

51860869 is a deficient number, since it is larger than the sum of its proper divisors (1).

51860869 is an equidigital number, since it uses as much as digits as its factorization.

51860869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 51860869 is about 7201.4490902873. The cubic root of 51860869 is about 372.9179285969.

The spelling of 51860869 in words is "fifty-one million, eight hundred sixty thousand, eight hundred sixty-nine".