2211947941 has 4 divisors (see below), whose sum is σ = 2527940512. Its totient is φ = 1895955372.

The previous prime is 2211947923. The next prime is 2211947953. The reversal of 2211947941 is 1497491122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1497491122 = 2 ⋅748745561.

It is a cyclic number.

It is not a de Polignac number, because 2211947941 - 2⁹ = 2211947429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2211947894 and 2211947903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211947141) 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 in 3 ways as a sum of consecutive naturals, for example, 157996275 + ... + 157996288.

It is an arithmetic number, because the mean of its divisors is an integer number (631985128).

Almost surely, 2^2211947941 is an apocalyptic number.

It is an amenable number.

2211947941 is a deficient number, since it is larger than the sum of its proper divisors (315992571).

2211947941 is an equidigital number, since it uses as much as digits as its factorization.

2211947941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315992570.

The product of its digits is 36288, while the sum is 40.

The square root of 2211947941 is about 47031.3506184970. The cubic root of 2211947941 is about 1302.9416504234.

The spelling of 2211947941 in words is "two billion, two hundred eleven million, nine hundred forty-seven thousand, nine hundred forty-one".