5455531021 has 2 divisors, whose sum is σ = 5455531022. Its totient is φ = 5455531020.

The previous prime is 5455531019. The next prime is 5455531031. The reversal of 5455531021 is 1201355545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3882536100 + 1572994921 = 62310^2 + 39661^2 .

It is a cyclic number.

It is not a de Polignac number, because 5455531021 - 2¹ = 5455531019 is a prime.

Together with 5455531019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5455531031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2727765510 + 2727765511.

It is an arithmetic number, because the mean of its divisors is an integer number (2727765511).

Almost surely, 2^5455531021 is an apocalyptic number.

It is an amenable number.

5455531021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5455531021 is an equidigital number, since it uses as much as digits as its factorization.

5455531021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 5455531021 is about 73861.5666026656. The cubic root of 5455531021 is about 1760.4039857970.

Adding to 5455531021 its reverse (1201355545), we get a palindrome (6656886566).

The spelling of 5455531021 in words is "five billion, four hundred fifty-five million, five hundred thirty-one thousand, twenty-one".