21252322431533 has 8 divisors (see below), whose sum is σ = 21426854276256. Its totient is φ = 21077976956400.

The previous prime is 21252322431499. The next prime is 21252322431619. The reversal of 21252322431533 is 33513422325212.

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 21252322431533 - 2⁶ = 21252322431469 is a prime.

It is a super-2 number, since 2×21252322431533² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21252322436533) 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 in 7 ways as a sum of consecutive naturals, for example, 46363391 + ... + 46819532.

It is an arithmetic number, because the mean of its divisors is an integer number (2678356784532).

Almost surely, 2^{21252322431533} is an apocalyptic number.

It is an amenable number.

21252322431533 is a deficient number, since it is larger than the sum of its proper divisors (174531844723).

21252322431533 is a wasteful number, since it uses less digits than its factorization.

21252322431533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93184795.

The product of its digits is 259200, while the sum is 38.

Adding to 21252322431533 its reverse (33513422325212), we get a palindrome (54765744756745).

The spelling of 21252322431533 in words is "twenty-one trillion, two hundred fifty-two billion, three hundred twenty-two million, four hundred thirty-one thousand, five hundred thirty-three".