2556212149 has 2 divisors, whose sum is σ = 2556212150. Its totient is φ = 2556212148.

The previous prime is 2556212069. The next prime is 2556212159. The reversal of 2556212149 is 9412126552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2380464100 + 175748049 = 48790^2 + 13257^2 .

It is a cyclic number.

It is not a de Polignac number, because 2556212149 - 2¹³ = 2556203957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2556212159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278106074 + 1278106075.

It is an arithmetic number, because the mean of its divisors is an integer number (1278106075).

Almost surely, 2^2556212149 is an apocalyptic number.

It is an amenable number.

2556212149 is a deficient number, since it is larger than the sum of its proper divisors (1).

2556212149 is an equidigital number, since it uses as much as digits as its factorization.

2556212149 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2556212149 is about 50558.9967167071. The cubic root of 2556212149 is about 1367.3057228295.

The spelling of 2556212149 in words is "two billion, five hundred fifty-six million, two hundred twelve thousand, one hundred forty-nine".