21502023133315 has 8 divisors (see below), whose sum is σ = 27320217628320. Its totient is φ = 16189758594432.

The previous prime is 21502023133313. The next prime is 21502023133319. The reversal of 21502023133315 is 51333132020512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21502023133315 - 2¹ = 21502023133313 is a prime.

It is a super-2 number, since 2×21502023133315² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21502023133313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126482488935 + ... + 126482489104.

It is an arithmetic number, because the mean of its divisors is an integer number (3415027203540).

Almost surely, 2^{21502023133315} is an apocalyptic number.

21502023133315 is a deficient number, since it is larger than the sum of its proper divisors (5818194495005).

21502023133315 is a wasteful number, since it uses less digits than its factorization.

21502023133315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252964978061.

The product of its (nonzero) digits is 16200, while the sum is 31.

Adding to 21502023133315 its reverse (51333132020512), we get a palindrome (72835155153827).

The spelling of 21502023133315 in words is "twenty-one trillion, five hundred two billion, twenty-three million, one hundred thirty-three thousand, three hundred fifteen".