51361129 has 2 divisors, whose sum is σ = 51361130. Its totient is φ = 51361128.

The previous prime is 51361091. The next prime is 51361153. The reversal of 51361129 is 92116315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33085504 + 18275625 = 5752^2 + 4275^2 .

It is a cyclic number.

It is not a de Polignac number, because 51361129 - 2²³ = 42972521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51361097 and 51361106.

It is not a weakly prime, because it can be changed into another prime (51361169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25680564 + 25680565.

It is an arithmetic number, because the mean of its divisors is an integer number (25680565).

Almost surely, 2^51361129 is an apocalyptic number.

It is an amenable number.

51361129 is a deficient number, since it is larger than the sum of its proper divisors (1).

51361129 is an equidigital number, since it uses as much as digits as its factorization.

51361129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 28.

The square root of 51361129 is about 7166.6679147286. The cubic root of 51361129 is about 371.7162272004.

The spelling of 51361129 in words is "fifty-one million, three hundred sixty-one thousand, one hundred twenty-nine".