2156520529 has 2 divisors, whose sum is σ = 2156520530. Its totient is φ = 2156520528.

The previous prime is 2156520517. The next prime is 2156520547. The reversal of 2156520529 is 9250256512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1502337600 + 654182929 = 38760^2 + 25577^2 .

It is a cyclic number.

It is not a de Polignac number, because 2156520529 - 2⁵ = 2156520497 is a prime.

It is not a weakly prime, because it can be changed into another prime (2156520029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078260264 + 1078260265.

It is an arithmetic number, because the mean of its divisors is an integer number (1078260265).

Almost surely, 2^2156520529 is an apocalyptic number.

It is an amenable number.

2156520529 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156520529 is an equidigital number, since it uses as much as digits as its factorization.

2156520529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54000, while the sum is 37.

The square root of 2156520529 is about 46438.3519195072. The cubic root of 2156520529 is about 1291.9663397778.

The spelling of 2156520529 in words is "two billion, one hundred fifty-six million, five hundred twenty thousand, five hundred twenty-nine".