51550645 has 8 divisors (see below), whose sum is σ = 62271360. Its totient is φ = 40966800.

The previous prime is 51550643. The next prime is 51550649. The reversal of 51550645 is 54605515.

51550645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51550645 - 2¹ = 51550643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51550643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33385 + ... + 34894.

It is an arithmetic number, because the mean of its divisors is an integer number (7783920).

Almost surely, 2^51550645 is an apocalyptic number.

It is an amenable number.

51550645 is a deficient number, since it is larger than the sum of its proper divisors (10720715).

51550645 is a wasteful number, since it uses less digits than its factorization.

51550645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68435.

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 51550645 is about 7179.8777844752. The cubic root of 51550645 is about 372.1728611392.

The spelling of 51550645 in words is "fifty-one million, five hundred fifty thousand, six hundred forty-five".