5540340521 has 4 divisors (see below), whose sum is σ = 5690079492. Its totient is φ = 5390601552.

The previous prime is 5540340479. The next prime is 5540340523. The reversal of 5540340521 is 1250430455.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4385088400 + 1155252121 = 66220^2 + 33989^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5540340521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5540340523) 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, 74869430 + ... + 74869503.

It is an arithmetic number, because the mean of its divisors is an integer number (1422519873).

Almost surely, 2^5540340521 is an apocalyptic number.

It is an amenable number.

5540340521 is a deficient number, since it is larger than the sum of its proper divisors (149738971).

5540340521 is a wasteful number, since it uses less digits than its factorization.

5540340521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149738970.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 5540340521 is about 74433.4637176049. The cubic root of 5540340521 is about 1769.4792983540.

Adding to 5540340521 its reverse (1250430455), we get a palindrome (6790770976).

The spelling of 5540340521 in words is "five billion, five hundred forty million, three hundred forty thousand, five hundred twenty-one".