51971323 has 4 divisors (see below), whose sum is σ = 52951968. Its totient is φ = 50990680.

The previous prime is 51971281. The next prime is 51971333. The reversal of 51971323 is 32317915.

51971323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51971323 - 2⁹ = 51970811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51971333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490243 + ... + 490348.

It is an arithmetic number, because the mean of its divisors is an integer number (13237992).

Almost surely, 2^51971323 is an apocalyptic number.

51971323 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

51971323 is a deficient number, since it is larger than the sum of its proper divisors (980645).

51971323 is an equidigital number, since it uses as much as digits as its factorization.

51971323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980644.

The product of its digits is 5670, while the sum is 31.

The square root of 51971323 is about 7209.1138845215. The cubic root of 51971323 is about 373.1824894607.

The spelling of 51971323 in words is "fifty-one million, nine hundred seventy-one thousand, three hundred twenty-three".