51814649 has 2 divisors, whose sum is σ = 51814650. Its totient is φ = 51814648.

The previous prime is 51814621. The next prime is 51814661. The reversal of 51814649 is 94641815.

51814649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37699600 + 14115049 = 6140^2 + 3757^2 .

It is a cyclic number.

It is not a de Polignac number, because 51814649 - 2¹² = 51810553 is a prime.

It is not a weakly prime, because it can be changed into another prime (51814669) 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, 25907324 + 25907325.

It is an arithmetic number, because the mean of its divisors is an integer number (25907325).

Almost surely, 2^51814649 is an apocalyptic number.

It is an amenable number.

51814649 is a deficient number, since it is larger than the sum of its proper divisors (1).

51814649 is an equidigital number, since it uses as much as digits as its factorization.

51814649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 38.

The square root of 51814649 is about 7198.2392986063. The cubic root of 51814649 is about 372.8071103633.

The spelling of 51814649 in words is "fifty-one million, eight hundred fourteen thousand, six hundred forty-nine".