2238171157 has 2 divisors, whose sum is σ = 2238171158. Its totient is φ = 2238171156.

The previous prime is 2238171149. The next prime is 2238171179. The reversal of 2238171157 is 7511718322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1768538916 + 469632241 = 42054^2 + 21671^2 .

It is a cyclic number.

It is not a de Polignac number, because 2238171157 - 2³ = 2238171149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2238171857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1119085578 + 1119085579.

It is an arithmetic number, because the mean of its divisors is an integer number (1119085579).

Almost surely, 2^2238171157 is an apocalyptic number.

It is an amenable number.

2238171157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2238171157 is an equidigital number, since it uses as much as digits as its factorization.

2238171157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23520, while the sum is 37.

The square root of 2238171157 is about 47309.3136390711. The cubic root of 2238171157 is about 1308.0703398176.

Adding to 2238171157 its reverse (7511718322), we get a palindrome (9749889479).

The spelling of 2238171157 in words is "two billion, two hundred thirty-eight million, one hundred seventy-one thousand, one hundred fifty-seven".