5443256921 has 4 divisors (see below), whose sum is σ = 5445038244. Its totient is φ = 5441475600.

The previous prime is 5443256891. The next prime is 5443256927. The reversal of 5443256921 is 1296523445.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3176449600 + 2266807321 = 56360^2 + 47611^2 .

It is a cyclic number.

It is not a de Polignac number, because 5443256921 - 2²² = 5439062617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5443256927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 886070 + ... + 892191.

It is an arithmetic number, because the mean of its divisors is an integer number (1361259561).

Almost surely, 2^5443256921 is an apocalyptic number.

It is an amenable number.

5443256921 is a deficient number, since it is larger than the sum of its proper divisors (1781323).

5443256921 is a wasteful number, since it uses less digits than its factorization.

5443256921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781322.

The product of its digits is 259200, while the sum is 41.

The square root of 5443256921 is about 73778.4312722899. The cubic root of 5443256921 is about 1759.0827823444.

The spelling of 5443256921 in words is "five billion, four hundred forty-three million, two hundred fifty-six thousand, nine hundred twenty-one".