2811226421 has 2 divisors, whose sum is σ = 2811226422. Its totient is φ = 2811226420.

The previous prime is 2811226387. The next prime is 2811226427. The reversal of 2811226421 is 1246221182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1786330225 + 1024896196 = 42265^2 + 32014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2811226421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2811226427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1405613210 + 1405613211.

It is an arithmetic number, because the mean of its divisors is an integer number (1405613211).

Almost surely, 2^2811226421 is an apocalyptic number.

It is an amenable number.

2811226421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2811226421 is an equidigital number, since it uses as much as digits as its factorization.

2811226421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3072, while the sum is 29.

The square root of 2811226421 is about 53020.9998113955. Note that the first 3 decimals coincide. The cubic root of 2811226421 is about 1411.3409473798.

The spelling of 2811226421 in words is "two billion, eight hundred eleven million, two hundred twenty-six thousand, four hundred twenty-one".