505226129 has 2 divisors, whose sum is σ = 505226130. Its totient is φ = 505226128.

The previous prime is 505226107. The next prime is 505226143. The reversal of 505226129 is 921622505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 447237904 + 57988225 = 21148^2 + 7615^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505226129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 505226095 and 505226104.

It is not a weakly prime, because it can be changed into another prime (505220129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252613064 + 252613065.

It is an arithmetic number, because the mean of its divisors is an integer number (252613065).

Almost surely, 2^505226129 is an apocalyptic number.

It is an amenable number.

505226129 is a deficient number, since it is larger than the sum of its proper divisors (1).

505226129 is an equidigital number, since it uses as much as digits as its factorization.

505226129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 505226129 is about 22477.2357953553. The cubic root of 505226129 is about 796.4562678186.

The spelling of 505226129 in words is "five hundred five million, two hundred twenty-six thousand, one hundred twenty-nine".