21163533146215 has 16 divisors (see below), whose sum is σ = 25875649410336. Its totient is φ = 16611225904000.

The previous prime is 21163533146167. The next prime is 21163533146263. The reversal of 21163533146215 is 51264133536112.

It is an interprime number because it is at equal distance from previous prime (21163533146167) and next prime (21163533146263).

It is not a de Polignac number, because 21163533146215 - 2²⁷ = 21163398928487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35506200 + ... + 36097330.

It is an arithmetic number, because the mean of its divisors is an integer number (1617228088146).

Almost surely, 2^{21163533146215} is an apocalyptic number.

21163533146215 is a deficient number, since it is larger than the sum of its proper divisors (4712116264121).

21163533146215 is a wasteful number, since it uses less digits than its factorization.

21163533146215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726290.

The product of its digits is 388800, while the sum is 43.

The spelling of 21163533146215 in words is "twenty-one trillion, one hundred sixty-three billion, five hundred thirty-three million, one hundred forty-six thousand, two hundred fifteen".