51645544 has 16 divisors (see below), whose sum is σ = 96940800. Its totient is φ = 25794672.

The previous prime is 51645533. The next prime is 51645547. The reversal of 51645544 is 44554615.

It is not an unprimeable number, because it can be changed into a prime (51645547) 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, 5727 + ... + 11665.

It is an arithmetic number, because the mean of its divisors is an integer number (6058800).

Almost surely, 2^51645544 is an apocalyptic number.

It is an amenable number.

51645544 is a deficient number, since it is larger than the sum of its proper divisors (45295256).

51645544 is a wasteful number, since it uses less digits than its factorization.

51645544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7032 (or 7028 counting only the distinct ones).

The product of its digits is 48000, while the sum is 34.

The square root of 51645544 is about 7186.4834237616. The cubic root of 51645544 is about 372.4010974158.

The spelling of 51645544 in words is "fifty-one million, six hundred forty-five thousand, five hundred forty-four".