51556343 has 4 divisors (see below), whose sum is σ = 51578280. Its totient is φ = 51534408.

The previous prime is 51556331. The next prime is 51556369. The reversal of 51556343 is 34365515.

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 51556343 - 2⁴ = 51556327 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 (51556303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6953 + ... + 12306.

It is an arithmetic number, because the mean of its divisors is an integer number (12894570).

Almost surely, 2^51556343 is an apocalyptic number.

51556343 is a deficient number, since it is larger than the sum of its proper divisors (21937).

51556343 is a wasteful number, since it uses less digits than its factorization.

51556343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21936.

The product of its digits is 27000, while the sum is 32.

The square root of 51556343 is about 7180.2745769225. The cubic root of 51556343 is about 372.1865729808.

The spelling of 51556343 in words is "fifty-one million, five hundred fifty-six thousand, three hundred forty-three".