51650645 has 16 divisors (see below), whose sum is σ = 65677440. Its totient is φ = 38885184.

The previous prime is 51650633. The next prime is 51650659. The reversal of 51650645 is 54605615.

It is a cyclic number.

It is not a de Polignac number, because 51650645 - 2¹² = 51646549 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13184 + ... + 16646.

It is an arithmetic number, because the mean of its divisors is an integer number (4104840).

Almost surely, 2^51650645 is an apocalyptic number.

It is an amenable number.

51650645 is a deficient number, since it is larger than the sum of its proper divisors (14026795).

51650645 is a wasteful number, since it uses less digits than its factorization.

51650645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3644.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 51650645 is about 7186.8383173688. The cubic root of 51650645 is about 372.4133576246.

The spelling of 51650645 in words is "fifty-one million, six hundred fifty thousand, six hundred forty-five".