2543738931 has 16 divisors (see below), whose sum is σ = 3813909120. Its totient is φ = 1675392840.

The previous prime is 2543738909. The next prime is 2543738959. The reversal of 2543738931 is 1398373452.

2543738931 is a `hidden beast` number, since 2 + 543 + 73 + 8 + 9 + 31 = 666.

2543738931 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2543738931 - 2¹⁰ = 2543737907 is a prime.

It is a super-2 number, since 2×2543738931² = 12941215498170045522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2543738971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 565305 + ... + 569786.

It is an arithmetic number, because the mean of its divisors is an integer number (238369320).

Almost surely, 2^2543738931 is an apocalyptic number.

2543738931 is a deficient number, since it is larger than the sum of its proper divisors (1270170189).

2543738931 is a wasteful number, since it uses less digits than its factorization.

2543738931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135183 (or 1135177 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 2543738931 is about 50435.4927704687. The cubic root of 2543738931 is about 1365.0781406782.

The spelling of 2543738931 in words is "two billion, five hundred forty-three million, seven hundred thirty-eight thousand, nine hundred thirty-one".