2211551197 has 2 divisors, whose sum is σ = 2211551198. Its totient is φ = 2211551196.

The previous prime is 2211551183. The next prime is 2211551219. The reversal of 2211551197 is 7911551122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2168858041 + 42693156 = 46571^2 + 6534^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2211551197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2211551117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105775598 + 1105775599.

It is an arithmetic number, because the mean of its divisors is an integer number (1105775599).

Almost surely, 2^2211551197 is an apocalyptic number.

It is an amenable number.

2211551197 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211551197 is an equidigital number, since it uses as much as digits as its factorization.

2211551197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6300, while the sum is 34.

The square root of 2211551197 is about 47027.1325619583. The cubic root of 2211551197 is about 1302.8637454568.

The spelling of 2211551197 in words is "two billion, two hundred eleven million, five hundred fifty-one thousand, one hundred ninety-seven".