51896649 has 32 divisors (see below), whose sum is σ = 81222400. Its totient is φ = 28864512.

The previous prime is 51896639. The next prime is 51896687. The reversal of 51896649 is 94669815.

51896649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51896649 - 2⁴ = 51896633 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51896598 and 51896607.

It is not an unprimeable number, because it can be changed into a prime (51896629) 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 in 31 ways as a sum of consecutive naturals, for example, 148527 + ... + 148875.

It is an arithmetic number, because the mean of its divisors is an integer number (2538200).

Almost surely, 2^51896649 is an apocalyptic number.

It is an amenable number.

51896649 is a deficient number, since it is larger than the sum of its proper divisors (29325751).

51896649 is a wasteful number, since it uses less digits than its factorization.

51896649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529.

The product of its digits is 466560, while the sum is 48.

The square root of 51896649 is about 7203.9328841960. The cubic root of 51896649 is about 373.0036704184.

The spelling of 51896649 in words is "fifty-one million, eight hundred ninety-six thousand, six hundred forty-nine".