21353159 has 2 divisors, whose sum is σ = 21353160. Its totient is φ = 21353158.

The previous prime is 21353153. The next prime is 21353191. The reversal of 21353159 is 95135312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21353159 - 2¹² = 21349063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21353153) 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, 10676579 + 10676580.

It is an arithmetic number, because the mean of its divisors is an integer number (10676580).

Almost surely, 2^21353159 is an apocalyptic number.

21353159 is a deficient number, since it is larger than the sum of its proper divisors (1).

21353159 is an equidigital number, since it uses as much as digits as its factorization.

21353159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4050, while the sum is 29.

The square root of 21353159 is about 4620.9478464921. The cubic root of 21353159 is about 277.4303978241.

It can be divided in two parts, 21353 and 159, that added together give a palindrome (21512).

The spelling of 21353159 in words is "twenty-one million, three hundred fifty-three thousand, one hundred fifty-nine".