5312821381 has 4 divisors (see below), whose sum is σ = 6071795872. Its totient is φ = 4553846892.

The previous prime is 5312821357. The next prime is 5312821387. The reversal of 5312821381 is 1831282135.

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 not a de Polignac number, because 5312821381 - 2⁷ = 5312821253 is a prime.

It is a super-2 number, since 2×5312821381² = 56452142052821494322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5312821387) 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, 379487235 + ... + 379487248.

It is an arithmetic number, because the mean of its divisors is an integer number (1517948968).

Almost surely, 2^5312821381 is an apocalyptic number.

It is an amenable number.

5312821381 is a deficient number, since it is larger than the sum of its proper divisors (758974491).

5312821381 is an equidigital number, since it uses as much as digits as its factorization.

5312821381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758974490.

The product of its digits is 11520, while the sum is 34.

The square root of 5312821381 is about 72889.1033076961. The cubic root of 5312821381 is about 1744.9181967274.

The spelling of 5312821381 in words is "five billion, three hundred twelve million, eight hundred twenty-one thousand, three hundred eighty-one".