2544196021 has 2 divisors, whose sum is σ = 2544196022. Its totient is φ = 2544196020.

The previous prime is 2544195949. The next prime is 2544196043. The reversal of 2544196021 is 1206914452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2337239025 + 206956996 = 48345^2 + 14386^2 .

It is a cyclic number.

It is not a de Polignac number, because 2544196021 - 2²¹ = 2542098869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2544190021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1272098010 + 1272098011.

It is an arithmetic number, because the mean of its divisors is an integer number (1272098011).

Almost surely, 2^2544196021 is an apocalyptic number.

It is an amenable number.

2544196021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2544196021 is an equidigital number, since it uses as much as digits as its factorization.

2544196021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 2544196021 is about 50440.0239988048. The cubic root of 2544196021 is about 1365.1599004047.

The spelling of 2544196021 in words is "two billion, five hundred forty-four million, one hundred ninety-six thousand, twenty-one".