51445345 has 24 divisors (see below), whose sum is σ = 73051200. Its totient is φ = 34669152.

The previous prime is 51445343. The next prime is 51445357. The reversal of 51445345 is 54354415.

It is a happy number.

51445345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51445345 - 2¹ = 51445343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51445343) 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 23 ways as a sum of consecutive naturals, for example, 12676 + ... + 16234.

It is an arithmetic number, because the mean of its divisors is an integer number (3043800).

Almost surely, 2^51445345 is an apocalyptic number.

It is an amenable number.

51445345 is a deficient number, since it is larger than the sum of its proper divisors (21605855).

51445345 is a wasteful number, since it uses less digits than its factorization.

51445345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3637 (or 3630 counting only the distinct ones).

The product of its digits is 24000, while the sum is 31.

The square root of 51445345 is about 7172.5410420575. The cubic root of 51445345 is about 371.9192819240.

The spelling of 51445345 in words is "fifty-one million, four hundred forty-five thousand, three hundred forty-five".