2173838257 has 2 divisors, whose sum is σ = 2173838258. Its totient is φ = 2173838256.

The previous prime is 2173838201. The next prime is 2173838267. The reversal of 2173838257 is 7528383712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2164203441 + 9634816 = 46521^2 + 3104^2 .

It is a cyclic number.

It is not a de Polignac number, because 2173838257 - 2¹¹ = 2173836209 is a prime.

It is not a weakly prime, because it can be changed into another prime (2173838267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086919128 + 1086919129.

It is an arithmetic number, because the mean of its divisors is an integer number (1086919129).

Almost surely, 2^2173838257 is an apocalyptic number.

It is an amenable number.

2173838257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2173838257 is an equidigital number, since it uses as much as digits as its factorization.

2173838257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 46.

The square root of 2173838257 is about 46624.4384094865. The cubic root of 2173838257 is about 1295.4154601848.

It can be divided in two parts, 21738 and 38257, that added together give a palindrome (59995).

The spelling of 2173838257 in words is "two billion, one hundred seventy-three million, eight hundred thirty-eight thousand, two hundred fifty-seven".