533481808642421 has 4 divisors (see below), whose sum is σ = 533482927926144. Its totient is φ = 533480689358700.

The previous prime is 533481808642369. The next prime is 533481808642441. The reversal of 533481808642421 is 124246808184335.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 533481808642421 - 2⁴² = 529083762131317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (533481808642441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 558926615 + ... + 559880276.

It is an arithmetic number, because the mean of its divisors is an integer number (133370731981536).

Almost surely, 2^{533481808642421} is an apocalyptic number.

It is an amenable number.

533481808642421 is a deficient number, since it is larger than the sum of its proper divisors (1119283723).

533481808642421 is a wasteful number, since it uses less digits than its factorization.

533481808642421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119283722.

The product of its (nonzero) digits is 35389440, while the sum is 59.

The spelling of 533481808642421 in words is "five hundred thirty-three trillion, four hundred eighty-one billion, eight hundred eight million, six hundred forty-two thousand, four hundred twenty-one".