51545445 has 64 divisors (see below), whose sum is σ = 101523456. Its totient is φ = 21795840.

The previous prime is 51545443. The next prime is 51545449. The reversal of 51545445 is 54454515.

It is not a de Polignac number, because 51545445 - 2¹ = 51545443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51545443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 119380 + ... + 119810.

It is an arithmetic number, because the mean of its divisors is an integer number (1586304).

Almost surely, 2^51545445 is an apocalyptic number.

It is an amenable number.

51545445 is a deficient number, since it is larger than the sum of its proper divisors (49978011).

51545445 is a wasteful number, since it uses less digits than its factorization.

51545445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530.

The product of its digits is 40000, while the sum is 33.

The square root of 51545445 is about 7179.5156521871. The cubic root of 51545445 is about 372.1603468182.

The spelling of 51545445 in words is "fifty-one million, five hundred forty-five thousand, four hundred forty-five".