2385181 has 2 divisors, whose sum is σ = 2385182. Its totient is φ = 2385180.

The previous prime is 2385157. The next prime is 2385191. The reversal of 2385181 is 1815832.

It is the 631-st star number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1452025 + 933156 = 1205^2 + 966^2 .

It is a cyclic number.

It is not a de Polignac number, because 2385181 - 2¹³ = 2376989 is a prime.

It is a super-2 number, since 2×2385181² = 11378176805522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2385121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1192590 + 1192591.

It is an arithmetic number, because the mean of its divisors is an integer number (1192591).

2^2385181 is an apocalyptic number.

It is an amenable number.

2385181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2385181 is an equidigital number, since it uses as much as digits as its factorization.

2385181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 28.

The square root of 2385181 is about 1544.4031209500. The cubic root of 2385181 is about 133.6104562615.

It can be divided in two parts, 23851 and 81, that added together give a palindrome (23932).

The spelling of 2385181 in words is "two million, three hundred eighty-five thousand, one hundred eighty-one".