6540223523 has 2 divisors, whose sum is σ = 6540223524. Its totient is φ = 6540223522.

The previous prime is 6540223511. The next prime is 6540223541. The reversal of 6540223523 is 3253220456.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6540223523 - 2⁴ = 6540223507 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6540223523.

It is not a weakly prime, because it can be changed into another prime (6540223553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3270111761 + 3270111762.

It is an arithmetic number, because the mean of its divisors is an integer number (3270111762).

Almost surely, 2^6540223523 is an apocalyptic number.

6540223523 is a deficient number, since it is larger than the sum of its proper divisors (1).

6540223523 is an equidigital number, since it uses as much as digits as its factorization.

6540223523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 32.

The square root of 6540223523 is about 80871.6484498740. The cubic root of 6540223523 is about 1870.0972737678.

Adding to 6540223523 its reverse (3253220456), we get a palindrome (9793443979).

The spelling of 6540223523 in words is "six billion, five hundred forty million, two hundred twenty-three thousand, five hundred twenty-three".