533378681 has 4 divisors (see below), whose sum is σ = 581867664. Its totient is φ = 484889700.

The previous prime is 533378647. The next prime is 533378687. The reversal of 533378681 is 186873335.

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 533378681 - 2⁶ = 533378617 is a prime.

It is a super-2 number, since 2×533378681² = 568985634690599522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (533378687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24244475 + ... + 24244496.

It is an arithmetic number, because the mean of its divisors is an integer number (145466916).

Almost surely, 2^533378681 is an apocalyptic number.

It is an amenable number.

533378681 is a deficient number, since it is larger than the sum of its proper divisors (48488983).

533378681 is a wasteful number, since it uses less digits than its factorization.

533378681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48488982.

The product of its digits is 362880, while the sum is 44.

The square root of 533378681 is about 23094.9925524993. The cubic root of 533378681 is about 810.9832498974.

The spelling of 533378681 in words is "five hundred thirty-three million, three hundred seventy-eight thousand, six hundred eighty-one".