5503840921 has 2 divisors, whose sum is σ = 5503840922. Its totient is φ = 5503840920.

The previous prime is 5503840919. The next prime is 5503840931. The reversal of 5503840921 is 1290483055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3795176025 + 1708664896 = 61605^2 + 41336^2 .

It is a cyclic number.

It is not a de Polignac number, because 5503840921 - 2¹ = 5503840919 is a prime.

Together with 5503840919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (5503840931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2751920460 + 2751920461.

It is an arithmetic number, because the mean of its divisors is an integer number (2751920461).

Almost surely, 2^5503840921 is an apocalyptic number.

It is an amenable number.

5503840921 is a deficient number, since it is larger than the sum of its proper divisors (1).

5503840921 is an equidigital number, since it uses as much as digits as its factorization.

5503840921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 5503840921 is about 74187.8758356108. The cubic root of 5503840921 is about 1765.5849747477.

It can be divided in two parts, 55038 and 40921, that added together give a palindrome (95959).

The spelling of 5503840921 in words is "five billion, five hundred three million, eight hundred forty thousand, nine hundred twenty-one".