51261629 has 2 divisors, whose sum is σ = 51261630. Its totient is φ = 51261628.

The previous prime is 51261611. The next prime is 51261643. The reversal of 51261629 is 92616215.

It is a happy number.

51261629 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51122500 + 139129 = 7150^2 + 373^2 .

It is a cyclic number.

It is not a de Polignac number, because 51261629 - 2²⁴ = 34484413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51261595 and 51261604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51261649) 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 as a sum of consecutive naturals, namely, 25630814 + 25630815.

It is an arithmetic number, because the mean of its divisors is an integer number (25630815).

Almost surely, 2^51261629 is an apocalyptic number.

It is an amenable number.

51261629 is a deficient number, since it is larger than the sum of its proper divisors (1).

51261629 is an equidigital number, since it uses as much as digits as its factorization.

51261629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 32.

The square root of 51261629 is about 7159.7226901606. The cubic root of 51261629 is about 371.4760346996.

The spelling of 51261629 in words is "fifty-one million, two hundred sixty-one thousand, six hundred twenty-nine".