51027649 has 2 divisors, whose sum is σ = 51027650. Its totient is φ = 51027648.

The previous prime is 51027637. The next prime is 51027667. The reversal of 51027649 is 94672015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48205249 + 2822400 = 6943^2 + 1680^2 .

It is a cyclic number.

It is not a de Polignac number, because 51027649 - 2²³ = 42639041 is a prime.

It is not a weakly prime, because it can be changed into another prime (51027619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25513824 + 25513825.

It is an arithmetic number, because the mean of its divisors is an integer number (25513825).

Almost surely, 2^51027649 is an apocalyptic number.

It is an amenable number.

51027649 is a deficient number, since it is larger than the sum of its proper divisors (1).

51027649 is an equidigital number, since it uses as much as digits as its factorization.

51027649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 51027649 is about 7143.3639834465. The cubic root of 51027649 is about 370.9099807508.

The spelling of 51027649 in words is "fifty-one million, twenty-seven thousand, six hundred forty-nine".