51445339 has 4 divisors (see below), whose sum is σ = 56122200. Its totient is φ = 46768480.

The previous prime is 51445327. The next prime is 51445343. The reversal of 51445339 is 93354415.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 51445339 - 2¹⁷ = 51314267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51445039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2338414 + ... + 2338435.

It is an arithmetic number, because the mean of its divisors is an integer number (14030550).

Almost surely, 2^51445339 is an apocalyptic number.

51445339 is a deficient number, since it is larger than the sum of its proper divisors (4676861).

51445339 is a wasteful number, since it uses less digits than its factorization.

51445339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4676860.

The product of its digits is 32400, while the sum is 34.

The square root of 51445339 is about 7172.5406237957. The cubic root of 51445339 is about 371.9192674652.

The spelling of 51445339 in words is "fifty-one million, four hundred forty-five thousand, three hundred thirty-nine".