21441515250215 has 32 divisors (see below), whose sum is σ = 27478827417600. Its totient is φ = 16025630060160.

The previous prime is 21441515250161. The next prime is 21441515250241. The reversal of 21441515250215 is 51205251514412.

It is not a de Polignac number, because 21441515250215 - 2²² = 21441511055911 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39461474 + ... + 40001136.

It is an arithmetic number, because the mean of its divisors is an integer number (858713356800).

Almost surely, 2^{21441515250215} is an apocalyptic number.

21441515250215 is a deficient number, since it is larger than the sum of its proper divisors (6037312167385).

21441515250215 is a wasteful number, since it uses less digits than its factorization.

21441515250215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548567.

The product of its (nonzero) digits is 80000, while the sum is 38.

Adding to 21441515250215 its reverse (51205251514412), we get a palindrome (72646766764627).

The spelling of 21441515250215 in words is "twenty-one trillion, four hundred forty-one billion, five hundred fifteen million, two hundred fifty thousand, two hundred fifteen".