51864061 has 2 divisors, whose sum is σ = 51864062. Its totient is φ = 51864060.

The previous prime is 51864049. The next prime is 51864083. The reversal of 51864061 is 16046815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49632025 + 2232036 = 7045^2 + 1494^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51864061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51864041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25932030 + 25932031.

It is an arithmetic number, because the mean of its divisors is an integer number (25932031).

Almost surely, 2^51864061 is an apocalyptic number.

It is an amenable number.

51864061 is a deficient number, since it is larger than the sum of its proper divisors (1).

51864061 is an equidigital number, since it uses as much as digits as its factorization.

51864061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 51864061 is about 7201.6707089397. The cubic root of 51864061 is about 372.9255793853.

The spelling of 51864061 in words is "fifty-one million, eight hundred sixty-four thousand, sixty-one".