2158471829 has 2 divisors, whose sum is σ = 2158471830. Its totient is φ = 2158471828.

The previous prime is 2158471787. The next prime is 2158471831. The reversal of 2158471829 is 9281748512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1610818225 + 547653604 = 40135^2 + 23402^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2158471829 is a prime.

Together with 2158471831, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2158471859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1079235914 + 1079235915.

It is an arithmetic number, because the mean of its divisors is an integer number (1079235915).

Almost surely, 2^2158471829 is an apocalyptic number.

It is an amenable number.

2158471829 is a deficient number, since it is larger than the sum of its proper divisors (1).

2158471829 is an equidigital number, since it uses as much as digits as its factorization.

2158471829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 322560, while the sum is 47.

The square root of 2158471829 is about 46459.3567432869. The cubic root of 2158471829 is about 1292.3558953756.

The spelling of 2158471829 in words is "two billion, one hundred fifty-eight million, four hundred seventy-one thousand, eight hundred twenty-nine".