Search a number
-
+
2158423 is a prime number
BaseRepresentation
bin1000001110111101010111
311001122210121
420032331113
51023032143
6114132411
724226531
oct10167527
94048717
102158423
111244723
12881107
135a7597
14402851
152c97ed
hex20ef57

2158423 has 2 divisors, whose sum is σ = 2158424. Its totient is φ = 2158422.

The previous prime is 2158393. The next prime is 2158427. The reversal of 2158423 is 3248512.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-2158423 is a prime.

It is a super-3 number, since 3×21584233 = 30166917473334098901, which contains 333 as substring.

It is a d-powerful number, because it can be written as 25 + 1 + 53 + 87 + 42 + 211 + 310 .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2158427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1079211 + 1079212.

It is an arithmetic number, because the mean of its divisors is an integer number (1079212).

22158423 is an apocalyptic number.

2158423 is a deficient number, since it is larger than the sum of its proper divisors (1).

2158423 is an equidigital number, since it uses as much as digits as its factorization.

2158423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 25.

The square root of 2158423 is about 1469.1572414143. The cubic root of 2158423 is about 129.2346150067.

The spelling of 2158423 in words is "two million, one hundred fifty-eight thousand, four hundred twenty-three".