51397351 has 4 divisors (see below), whose sum is σ = 51509304. Its totient is φ = 51285400.

The previous prime is 51397289. The next prime is 51397363. The reversal of 51397351 is 15379315.

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

It is a cyclic number.

It is not a de Polignac number, because 51397351 - 2¹³ = 51389159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51397391) 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 3 ways as a sum of consecutive naturals, for example, 55285 + ... + 56206.

It is an arithmetic number, because the mean of its divisors is an integer number (12877326).

Almost surely, 2^51397351 is an apocalyptic number.

51397351 is a deficient number, since it is larger than the sum of its proper divisors (111953).

51397351 is a wasteful number, since it uses less digits than its factorization.

51397351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111952.

The product of its digits is 14175, while the sum is 34.

The square root of 51397351 is about 7169.1945851678. The cubic root of 51397351 is about 371.8035899038.

The spelling of 51397351 in words is "fifty-one million, three hundred ninety-seven thousand, three hundred fifty-one".