2271637421 has 2 divisors, whose sum is σ = 2271637422. Its totient is φ = 2271637420.

The previous prime is 2271637409. The next prime is 2271637429. The reversal of 2271637421 is 1247361722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1778308900 + 493328521 = 42170^2 + 22211^2 .

It is a cyclic number.

It is not a de Polignac number, because 2271637421 - 2²² = 2267443117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2271637429) 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, 1135818710 + 1135818711.

It is an arithmetic number, because the mean of its divisors is an integer number (1135818711).

Almost surely, 2^2271637421 is an apocalyptic number.

It is an amenable number.

2271637421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2271637421 is an equidigital number, since it uses as much as digits as its factorization.

2271637421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 35.

The square root of 2271637421 is about 47661.6976302775. The cubic root of 2271637421 is about 1314.5577545855.

The spelling of 2271637421 in words is "two billion, two hundred seventy-one million, six hundred thirty-seven thousand, four hundred twenty-one".