1151222279 has 2 divisors, whose sum is σ = 1151222280. Its totient is φ = 1151222278.

The previous prime is 1151222263. The next prime is 1151222297. The reversal of 1151222279 is 9722221511.

Together with next prime (1151222297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1151222279 - 2⁴ = 1151222263 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1151222879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 575611139 + 575611140.

It is an arithmetic number, because the mean of its divisors is an integer number (575611140).

Almost surely, 2^1151222279 is an apocalyptic number.

1151222279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1151222279 is an equidigital number, since it uses as much as digits as its factorization.

1151222279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 32.

The square root of 1151222279 is about 33929.6666502929. Note that the first 4 decimals coincide. The cubic root of 1151222279 is about 1048.0606011491.

The spelling of 1151222279 in words is "one billion, one hundred fifty-one million, two hundred twenty-two thousand, two hundred seventy-nine".