5213221351523 has 4 divisors (see below), whose sum is σ = 5218833000840. Its totient is φ = 5207609702208.

The previous prime is 5213221351519. The next prime is 5213221351561. The reversal of 5213221351523 is 3251531223125.

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

It is a cyclic number.

It is not a de Polignac number, because 5213221351523 - 2² = 5213221351519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5213221351573) 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, 2805823265 + ... + 2805825122.

It is an arithmetic number, because the mean of its divisors is an integer number (1304708250210).

Almost surely, 2^{5213221351523} is an apocalyptic number.

5213221351523 is a deficient number, since it is larger than the sum of its proper divisors (5611649317).

5213221351523 is an equidigital number, since it uses as much as digits as its factorization.

5213221351523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5611649316.

The product of its digits is 54000, while the sum is 35.

Adding to 5213221351523 its reverse (3251531223125), we get a palindrome (8464752574648).

The spelling of 5213221351523 in words is "five trillion, two hundred thirteen billion, two hundred twenty-one million, three hundred fifty-one thousand, five hundred twenty-three".