2543972481 has 32 divisors (see below), whose sum is σ = 4004227200. Its totient is φ = 1593224640.

The previous prime is 2543972479. The next prime is 2543972489. The reversal of 2543972481 is 1842793452.

2543972481 is a `hidden beast` number, since 2 + 543 + 9 + 7 + 24 + 81 = 666.

It is not a de Polignac number, because 2543972481 - 2¹ = 2543972479 is a prime.

It is a super-2 number, since 2×2543972481² = 12943591968170590722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2543972489) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14935 + ... + 72876.

It is an arithmetic number, because the mean of its divisors is an integer number (125132100).

Almost surely, 2^2543972481 is an apocalyptic number.

It is an amenable number.

2543972481 is a deficient number, since it is larger than the sum of its proper divisors (1460254719).

2543972481 is a wasteful number, since it uses less digits than its factorization.

2543972481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87886 (or 87880 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 2543972481 is about 50437.8080511039. The cubic root of 2543972481 is about 1365.1199170098.

The spelling of 2543972481 in words is "two billion, five hundred forty-three million, nine hundred seventy-two thousand, four hundred eighty-one".