51312829 has 2 divisors, whose sum is σ = 51312830. Its totient is φ = 51312828.

The previous prime is 51312809. The next prime is 51312847. The reversal of 51312829 is 92821315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50381604 + 931225 = 7098^2 + 965^2 .

It is a cyclic number.

It is not a de Polignac number, because 51312829 - 2¹³ = 51304637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51312829.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51312809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25656414 + 25656415.

It is an arithmetic number, because the mean of its divisors is an integer number (25656415).

Almost surely, 2^51312829 is an apocalyptic number.

It is an amenable number.

51312829 is a deficient number, since it is larger than the sum of its proper divisors (1).

51312829 is an equidigital number, since it uses as much as digits as its factorization.

51312829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 31.

The square root of 51312829 is about 7163.2973552687. The cubic root of 51312829 is about 371.5996700231.

The spelling of 51312829 in words is "fifty-one million, three hundred twelve thousand, eight hundred twenty-nine".