5388452821 has 4 divisors (see below), whose sum is σ = 5705420652. Its totient is φ = 5071484992.

The previous prime is 5388452819. The next prime is 5388452833. The reversal of 5388452821 is 1282548835.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1282548835 = 5 ⋅256509767.

It can be written as a sum of positive squares in 2 ways, for example, as 3348936900 + 2039515921 = 57870^2 + 45161^2 .

It is a cyclic number.

It is not a de Polignac number, because 5388452821 - 2¹ = 5388452819 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 (5388452521) 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, 158483890 + ... + 158483923.

It is an arithmetic number, because the mean of its divisors is an integer number (1426355163).

Almost surely, 2^5388452821 is an apocalyptic number.

It is an amenable number.

5388452821 is a deficient number, since it is larger than the sum of its proper divisors (316967831).

5388452821 is a wasteful number, since it uses less digits than its factorization.

5388452821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316967830.

The product of its digits is 614400, while the sum is 46.

The square root of 5388452821 is about 73406.0816349708. The cubic root of 5388452821 is about 1753.1592262030.

The spelling of 5388452821 in words is "five billion, three hundred eighty-eight million, four hundred fifty-two thousand, eight hundred twenty-one".