5438223721 has 8 divisors (see below), whose sum is σ = 6580707840. Its totient is φ = 4387138368.

The previous prime is 5438223691. The next prime is 5438223727. The reversal of 5438223721 is 1273228345.

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 5438223721 - 2⁹ = 5438223209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5438223727) 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, 22849561 + ... + 22849798.

It is an arithmetic number, because the mean of its divisors is an integer number (822588480).

Almost surely, 2^5438223721 is an apocalyptic number.

It is an amenable number.

5438223721 is a deficient number, since it is larger than the sum of its proper divisors (1142484119).

5438223721 is a wasteful number, since it uses less digits than its factorization.

5438223721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45699383.

The product of its digits is 80640, while the sum is 37.

The square root of 5438223721 is about 73744.3131434553. The cubic root of 5438223721 is about 1758.5404265492.

The spelling of 5438223721 in words is "five billion, four hundred thirty-eight million, two hundred twenty-three thousand, seven hundred twenty-one".