31045129 has 2 divisors, whose sum is σ = 31045130. Its totient is φ = 31045128.

The previous prime is 31045117. The next prime is 31045139. The reversal of 31045129 is 92154013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29160000 + 1885129 = 5400^2 + 1373^2 .

It is a cyclic number.

It is not a de Polignac number, because 31045129 - 2¹¹ = 31043081 is a prime.

It is not a weakly prime, because it can be changed into another prime (31045139) 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, 15522564 + 15522565.

It is an arithmetic number, because the mean of its divisors is an integer number (15522565).

Almost surely, 2^31045129 is an apocalyptic number.

It is an amenable number.

31045129 is a deficient number, since it is larger than the sum of its proper divisors (1).

31045129 is an equidigital number, since it uses as much as digits as its factorization.

31045129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 31045129 is about 5571.8155927848. The cubic root of 31045129 is about 314.2904293567.

The spelling of 31045129 in words is "thirty-one million, forty-five thousand, one hundred twenty-nine".