2158423279 has 2 divisors, whose sum is σ = 2158423280. Its totient is φ = 2158423278.

The previous prime is 2158423261. The next prime is 2158423297. The reversal of 2158423279 is 9723248512.

Together with next prime (2158423297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (2158423261) and next prime (2158423297).

It is a cyclic number.

It is not a de Polignac number, because 2158423279 - 2⁷ = 2158423151 is a prime.

It is a super-2 number, since 2×2158423279² = 9317582102658223682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2158423219) 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 as a sum of consecutive naturals, namely, 1079211639 + 1079211640.

It is an arithmetic number, because the mean of its divisors is an integer number (1079211640).

Almost surely, 2^2158423279 is an apocalyptic number.

2158423279 is a deficient number, since it is larger than the sum of its proper divisors (1).

2158423279 is an equidigital number, since it uses as much as digits as its factorization.

2158423279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 43.

The square root of 2158423279 is about 46458.8342406479. The cubic root of 2158423279 is about 1292.3462057504.

The spelling of 2158423279 in words is "two billion, one hundred fifty-eight million, four hundred twenty-three thousand, two hundred seventy-nine".