5181040129 has 2 divisors, whose sum is σ = 5181040130. Its totient is φ = 5181040128.

The previous prime is 5181040121. The next prime is 5181040141. The reversal of 5181040129 is 9210401815.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4896780529 + 284259600 = 69977^2 + 16860^2 .

It is a cyclic number.

It is not a de Polignac number, because 5181040129 - 2³ = 5181040121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5181040129.

It is not a weakly prime, because it can be changed into another prime (5181040121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2590520064 + 2590520065.

It is an arithmetic number, because the mean of its divisors is an integer number (2590520065).

Almost surely, 2^5181040129 is an apocalyptic number.

It is an amenable number.

5181040129 is a deficient number, since it is larger than the sum of its proper divisors (1).

5181040129 is an equidigital number, since it uses as much as digits as its factorization.

5181040129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 5181040129 is about 71979.4424054535. The cubic root of 5181040129 is about 1730.3700333356.

The spelling of 5181040129 in words is "five billion, one hundred eighty-one million, forty thousand, one hundred twenty-nine".