51484681 has 2 divisors, whose sum is σ = 51484682. Its totient is φ = 51484680.

The previous prime is 51484673. The next prime is 51484709. The reversal of 51484681 is 18648415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51337225 + 147456 = 7165^2 + 384^2 .

It is a cyclic number.

It is not a de Polignac number, because 51484681 - 2³ = 51484673 is a prime.

It is a super-2 number, since 2×51484681² = 5301344755343522, which contains 22 as substring.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 51484681.

It is not a weakly prime, because it can be changed into another prime (51484621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25742340 + 25742341.

It is an arithmetic number, because the mean of its divisors is an integer number (25742341).

Almost surely, 2^51484681 is an apocalyptic number.

It is an amenable number.

51484681 is a deficient number, since it is larger than the sum of its proper divisors (1).

51484681 is an equidigital number, since it uses as much as digits as its factorization.

51484681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30720, while the sum is 37.

The square root of 51484681 is about 7175.2826425166. The cubic root of 51484681 is about 372.0140497449.

The spelling of 51484681 in words is "fifty-one million, four hundred eighty-four thousand, six hundred eighty-one".