2563181 has 2 divisors, whose sum is σ = 2563182. Its totient is φ = 2563180.

The previous prime is 2563153. The next prime is 2563193. The reversal of 2563181 is 1813652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1865956 + 697225 = 1366^2 + 835^2 .

It is a cyclic number.

It is not a de Polignac number, because 2563181 - 2⁶ = 2563117 is a prime.

It is a super-2 number, since 2×2563181² = 13139793677522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2563181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2563151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1281590 + 1281591.

It is an arithmetic number, because the mean of its divisors is an integer number (1281591).

2^2563181 is an apocalyptic number.

It is an amenable number.

2563181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2563181 is an equidigital number, since it uses as much as digits as its factorization.

2563181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 26.

The square root of 2563181 is about 1600.9937538916. The cubic root of 2563181 is about 136.8547130473.

It can be divided in two parts, 2563 and 181, that added together give a cube (2744 = 14³).

The spelling of 2563181 in words is "two million, five hundred sixty-three thousand, one hundred eighty-one".