2117898151 has 2 divisors, whose sum is σ = 2117898152. Its totient is φ = 2117898150.

The previous prime is 2117898149. The next prime is 2117898203. The reversal of 2117898151 is 1518987112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2117898151 - 2¹ = 2117898149 is a prime.

Together with 2117898149, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2117898098 and 2117898107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2117898551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1058949075 + 1058949076.

It is an arithmetic number, because the mean of its divisors is an integer number (1058949076).

Almost surely, 2^2117898151 is an apocalyptic number.

2117898151 is a deficient number, since it is larger than the sum of its proper divisors (1).

2117898151 is an equidigital number, since it uses as much as digits as its factorization.

2117898151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 43.

The square root of 2117898151 is about 46020.6274511767. The cubic root of 2117898151 is about 1284.2069730293.

The spelling of 2117898151 in words is "two billion, one hundred seventeen million, eight hundred ninety-eight thousand, one hundred fifty-one".