21152513153 has 2 divisors, whose sum is σ = 21152513154. Its totient is φ = 21152513152.

The previous prime is 21152513141. The next prime is 21152513197. The reversal of 21152513153 is 35131525112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18348598849 + 2803914304 = 135457^2 + 52952^2 .

It is a cyclic number.

It is not a de Polignac number, because 21152513153 - 2¹² = 21152509057 is a prime.

It is not a weakly prime, because it can be changed into another prime (21152513953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10576256576 + 10576256577.

It is an arithmetic number, because the mean of its divisors is an integer number (10576256577).

Almost surely, 2^21152513153 is an apocalyptic number.

It is an amenable number.

21152513153 is a deficient number, since it is larger than the sum of its proper divisors (1).

21152513153 is an equidigital number, since it uses as much as digits as its factorization.

21152513153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4500, while the sum is 29.

The spelling of 21152513153 in words is "twenty-one billion, one hundred fifty-two million, five hundred thirteen thousand, one hundred fifty-three".