51463649 has 2 divisors, whose sum is σ = 51463650. Its totient is φ = 51463648.

The previous prime is 51463619. The next prime is 51463667. The reversal of 51463649 is 94636415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43983424 + 7480225 = 6632^2 + 2735^2 .

It is a cyclic number.

It is not a de Polignac number, because 51463649 - 2⁸ = 51463393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51463619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25731824 + 25731825.

It is an arithmetic number, because the mean of its divisors is an integer number (25731825).

Almost surely, 2^51463649 is an apocalyptic number.

It is an amenable number.

51463649 is a deficient number, since it is larger than the sum of its proper divisors (1).

51463649 is an equidigital number, since it uses as much as digits as its factorization.

51463649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 38.

The square root of 51463649 is about 7173.8169059434. The cubic root of 51463649 is about 371.9633857092.

The spelling of 51463649 in words is "fifty-one million, four hundred sixty-three thousand, six hundred forty-nine".