2538181 has 4 divisors (see below), whose sum is σ = 2542752. Its totient is φ = 2533612.

The previous prime is 2538169. The next prime is 2538203. The reversal of 2538181 is 1818352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2538181 - 2⁹ = 2537669 is a prime.

It is a super-2 number, since 2×2538181² = 12884725577522, which contains 22 as substring.

It is a Duffinian number.

2538181 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2538101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1315 + ... + 2608.

It is an arithmetic number, because the mean of its divisors is an integer number (635688).

2^2538181 is an apocalyptic number.

It is an amenable number.

2538181 is a deficient number, since it is larger than the sum of its proper divisors (4571).

2538181 is an equidigital number, since it uses as much as digits as its factorization.

2538181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4570.

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

The square root of 2538181 is about 1593.1669717892. The cubic root of 2538181 is about 136.4083208576.

The spelling of 2538181 in words is "two million, five hundred thirty-eight thousand, one hundred eighty-one".