51645044 has 24 divisors (see below), whose sum is σ = 101263008. Its totient is φ = 22839840.

The previous prime is 51645029. The next prime is 51645049. The reversal of 51645044 is 44054615.

It is a junction number, because it is equal to n+sod(n) for n = 51644998 and 51645016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51645049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14234 + ... + 17489.

It is an arithmetic number, because the mean of its divisors is an integer number (4219292).

Almost surely, 2^51645044 is an apocalyptic number.

It is an amenable number.

51645044 is a deficient number, since it is larger than the sum of its proper divisors (49617964).

51645044 is a wasteful number, since it uses less digits than its factorization.

51645044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31775 (or 31773 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 51645044 is about 7186.4486361485. The cubic root of 51645044 is about 372.3998956267.

Adding to 51645044 its reverse (44054615), we get a palindrome (95699659).

The spelling of 51645044 in words is "fifty-one million, six hundred forty-five thousand, forty-four".