51012644 has 12 divisors (see below), whose sum is σ = 93970800. Its totient is φ = 24163848.

The previous prime is 51012629. The next prime is 51012649. The reversal of 51012644 is 44621015.

It is not an unprimeable number, because it can be changed into a prime (51012649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 335534 + ... + 335685.

It is an arithmetic number, because the mean of its divisors is an integer number (7830900).

Almost surely, 2^51012644 is an apocalyptic number.

It is an amenable number.

51012644 is a deficient number, since it is larger than the sum of its proper divisors (42958156).

51012644 is a wasteful number, since it uses less digits than its factorization.

51012644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671242 (or 671240 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 51012644 is about 7142.3136307502. The cubic root of 51012644 is about 370.8736210518.

Adding to 51012644 its reverse (44621015), we get a palindrome (95633659).

The spelling of 51012644 in words is "fifty-one million, twelve thousand, six hundred forty-four".