2154123343 has 2 divisors, whose sum is σ = 2154123344. Its totient is φ = 2154123342.

The previous prime is 2154123331. The next prime is 2154123353. The reversal of 2154123343 is 3433214512.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2154123343 - 2¹⁷ = 2153992271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2154123353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077061671 + 1077061672.

It is an arithmetic number, because the mean of its divisors is an integer number (1077061672).

Almost surely, 2^2154123343 is an apocalyptic number.

2154123343 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154123343 is an equidigital number, since it uses as much as digits as its factorization.

2154123343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 28.

The square root of 2154123343 is about 46412.5343307172. The cubic root of 2154123343 is about 1291.4874461369.

Adding to 2154123343 its reverse (3433214512), we get a palindrome (5587337855).

The spelling of 2154123343 in words is "two billion, one hundred fifty-four million, one hundred twenty-three thousand, three hundred forty-three".