2543931 has 24 divisors (see below), whose sum is σ = 4193280. Its totient is φ = 1472256.

The previous prime is 2543921. The next prime is 2543939. The reversal of 2543931 is 1393452.

It is not a de Polignac number, because 2543931 - 2⁵ = 2543899 is a prime.

It is a super-2 number, since 2×2543931² = 12943169865522, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹⁹ + 5⁹ + 4⁸ + 3⁵ + 9 + 3⁶ + 1 .

2543931 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2543895 and 2543904.

It is not an unprimeable number, because it can be changed into a prime (2543939) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1350 + ... + 2628.

It is an arithmetic number, because the mean of its divisors is an integer number (174720).

2^2543931 is an apocalyptic number.

2543931 is a deficient number, since it is larger than the sum of its proper divisors (1649349).

2543931 is a wasteful number, since it uses less digits than its factorization.

2543931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315 (or 1312 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 2543931 is about 1594.9705326432. The cubic root of 2543931 is about 136.5112497269.

It can be divided in two parts, 25 and 43931, that added together give a triangular number (43956 = T₂₉₆).

The spelling of 2543931 in words is "two million, five hundred forty-three thousand, nine hundred thirty-one".