2455442021 has 2 divisors, whose sum is σ = 2455442022. Its totient is φ = 2455442020.

The previous prime is 2455441969. The next prime is 2455442047. The reversal of 2455442021 is 1202445542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1630948225 + 824493796 = 40385^2 + 28714^2 .

It is a cyclic number.

It is not a de Polignac number, because 2455442021 - 2⁶ = 2455441957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2455442321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1227721010 + 1227721011.

It is an arithmetic number, because the mean of its divisors is an integer number (1227721011).

Almost surely, 2^2455442021 is an apocalyptic number.

It is an amenable number.

2455442021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2455442021 is an equidigital number, since it uses as much as digits as its factorization.

2455442021 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 2455442021 is about 49552.4169037192. The cubic root of 2455442021 is about 1349.0971596703.

Adding to 2455442021 its reverse (1202445542), we get a palindrome (3657887563).

The spelling of 2455442021 in words is "two billion, four hundred fifty-five million, four hundred forty-two thousand, twenty-one".