51807629 has 2 divisors, whose sum is σ = 51807630. Its totient is φ = 51807628.

The previous prime is 51807617. The next prime is 51807671. The reversal of 51807629 is 92670815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38775529 + 13032100 = 6227^2 + 3610^2 .

It is a cyclic number.

It is not a de Polignac number, because 51807629 - 2²⁰ = 50759053 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 51807592 and 51807601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51807229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25903814 + 25903815.

It is an arithmetic number, because the mean of its divisors is an integer number (25903815).

Almost surely, 2^51807629 is an apocalyptic number.

It is an amenable number.

51807629 is a deficient number, since it is larger than the sum of its proper divisors (1).

51807629 is an equidigital number, since it uses as much as digits as its factorization.

51807629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 51807629 is about 7197.7516628458. The cubic root of 51807629 is about 372.7902732708.

The spelling of 51807629 in words is "fifty-one million, eight hundred seven thousand, six hundred twenty-nine".