51565373 has 4 divisors (see below), whose sum is σ = 54279360. Its totient is φ = 48851388.

The previous prime is 51565361. The next prime is 51565387. The reversal of 51565373 is 37356515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51565373 - 2⁴ = 51565357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51565303) 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, 1356965 + ... + 1357002.

It is an arithmetic number, because the mean of its divisors is an integer number (13569840).

Almost surely, 2^51565373 is an apocalyptic number.

It is an amenable number.

51565373 is a deficient number, since it is larger than the sum of its proper divisors (2713987).

51565373 is a wasteful number, since it uses less digits than its factorization.

51565373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2713986.

The product of its digits is 47250, while the sum is 35.

The square root of 51565373 is about 7180.9033554282. The cubic root of 51565373 is about 372.2083009801.

The spelling of 51565373 in words is "fifty-one million, five hundred sixty-five thousand, three hundred seventy-three".