51363644 has 6 divisors (see below), whose sum is σ = 89886384. Its totient is φ = 25681820.

The previous prime is 51363617. The next prime is 51363673. The reversal of 51363644 is 44636315.

It is a self number, because there is not a number n which added to its sum of digits gives 51363644.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6420452 + ... + 6420459.

It is an arithmetic number, because the mean of its divisors is an integer number (14981064).

Almost surely, 2^51363644 is an apocalyptic number.

It is an amenable number.

51363644 is a deficient number, since it is larger than the sum of its proper divisors (38522740).

51363644 is a wasteful number, since it uses less digits than its factorization.

51363644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12840915 (or 12840913 counting only the distinct ones).

The product of its digits is 25920, while the sum is 32.

The square root of 51363644 is about 7166.8433776663. The cubic root of 51363644 is about 371.7222943766.

Adding to 51363644 its reverse (44636315), we get a palindrome (95999959).

The spelling of 51363644 in words is "fifty-one million, three hundred sixty-three thousand, six hundred forty-four".