215245551253 has 2 divisors, whose sum is σ = 215245551254. Its totient is φ = 215245551252.

The previous prime is 215245551181. The next prime is 215245551299. The reversal of 215245551253 is 352155542512.

215245551253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171178305169 + 44067246084 = 413737^2 + 209922^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215245551253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215245551853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107622775626 + 107622775627.

It is an arithmetic number, because the mean of its divisors is an integer number (107622775627).

Almost surely, 2^215245551253 is an apocalyptic number.

It is an amenable number.

215245551253 is a deficient number, since it is larger than the sum of its proper divisors (1).

215245551253 is an equidigital number, since it uses as much as digits as its factorization.

215245551253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 300000, while the sum is 40.

The spelling of 215245551253 in words is "two hundred fifteen billion, two hundred forty-five million, five hundred fifty-one thousand, two hundred fifty-three".