51679213 has 2 divisors, whose sum is σ = 51679214. Its totient is φ = 51679212.

The previous prime is 51679211. The next prime is 51679217. The reversal of 51679213 is 31297615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51652969 + 26244 = 7187^2 + 162^2 .

It is a cyclic number.

It is not a de Polignac number, because 51679213 - 2¹ = 51679211 is a prime.

Together with 51679211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51679211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25839606 + 25839607.

It is an arithmetic number, because the mean of its divisors is an integer number (25839607).

Almost surely, 2^51679213 is an apocalyptic number.

It is an amenable number.

51679213 is a deficient number, since it is larger than the sum of its proper divisors (1).

51679213 is an equidigital number, since it uses as much as digits as its factorization.

51679213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 34.

The square root of 51679213 is about 7188.8255647220. The cubic root of 51679213 is about 372.4820056470.

The spelling of 51679213 in words is "fifty-one million, six hundred seventy-nine thousand, two hundred thirteen".