51373313 has 4 divisors (see below), whose sum is σ = 51501828. Its totient is φ = 51244800.

The previous prime is 51373307. The next prime is 51373327. The reversal of 51373313 is 31337315.

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

It can be written as a sum of positive squares in 2 ways, for example, as 31730689 + 19642624 = 5633^2 + 4432^2 .

It is a cyclic number.

It is not a de Polignac number, because 51373313 - 2¹⁰ = 51372289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51373363) 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, 63656 + ... + 64457.

It is an arithmetic number, because the mean of its divisors is an integer number (12875457).

Almost surely, 2^51373313 is an apocalyptic number.

It is an amenable number.

51373313 is a deficient number, since it is larger than the sum of its proper divisors (128515).

51373313 is a wasteful number, since it uses less digits than its factorization.

51373313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128514.

The product of its digits is 2835, while the sum is 26.

The square root of 51373313 is about 7167.5179106857. The cubic root of 51373313 is about 371.7456179902.

The spelling of 51373313 in words is "fifty-one million, three hundred seventy-three thousand, three hundred thirteen".