5540404421 has 2 divisors, whose sum is σ = 5540404422. Its totient is φ = 5540404420.

The previous prime is 5540404399. The next prime is 5540404439. The reversal of 5540404421 is 1244040455.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5459584321 + 80820100 = 73889^2 + 8990^2 .

It is a cyclic number.

It is not a de Polignac number, because 5540404421 - 2⁶ = 5540404357 is a prime.

It is a super-2 number, since 2×5540404421² = 61392162296472690482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5540404021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2770202210 + 2770202211.

It is an arithmetic number, because the mean of its divisors is an integer number (2770202211).

Almost surely, 2^5540404421 is an apocalyptic number.

It is an amenable number.

5540404421 is a deficient number, since it is larger than the sum of its proper divisors (1).

5540404421 is an equidigital number, since it uses as much as digits as its factorization.

5540404421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12800, while the sum is 29.

The square root of 5540404421 is about 74433.8929587859. The cubic root of 5540404421 is about 1769.4861011424.

Adding to 5540404421 its reverse (1244040455), we get a palindrome (6784444876).

The spelling of 5540404421 in words is "five billion, five hundred forty million, four hundred four thousand, four hundred twenty-one".