51376243 has 4 divisors (see below), whose sum is σ = 51721200. Its totient is φ = 51031288.

The previous prime is 51376231. The next prime is 51376249. The reversal of 51376243 is 34267315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34267315 = 5 ⋅6853463.

It is a cyclic number.

It is not a de Polignac number, because 51376243 - 2⁵ = 51376211 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (51376249) 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, 172255 + ... + 172552.

It is an arithmetic number, because the mean of its divisors is an integer number (12930300).

Almost surely, 2^51376243 is an apocalyptic number.

51376243 is a deficient number, since it is larger than the sum of its proper divisors (344957).

51376243 is a wasteful number, since it uses less digits than its factorization.

51376243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344956.

The product of its digits is 15120, while the sum is 31.

The square root of 51376243 is about 7167.7223020985. The cubic root of 51376243 is about 371.7526851741.

The spelling of 51376243 in words is "fifty-one million, three hundred seventy-six thousand, two hundred forty-three".