51384637 has 2 divisors, whose sum is σ = 51384638. Its totient is φ = 51384636.

The previous prime is 51384611. The next prime is 51384647. The reversal of 51384637 is 73648315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48525156 + 2859481 = 6966^2 + 1691^2 .

It is a cyclic number.

It is not a de Polignac number, because 51384637 - 2¹¹ = 51382589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51384596 and 51384605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51384647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25692318 + 25692319.

It is an arithmetic number, because the mean of its divisors is an integer number (25692319).

Almost surely, 2^51384637 is an apocalyptic number.

It is an amenable number.

51384637 is a deficient number, since it is larger than the sum of its proper divisors (1).

51384637 is an equidigital number, since it uses as much as digits as its factorization.

51384637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 37.

The square root of 51384637 is about 7168.3078198414. The cubic root of 51384637 is about 371.7729300832.

The spelling of 51384637 in words is "fifty-one million, three hundred eighty-four thousand, six hundred thirty-seven".