2540534987 has 8 divisors (see below), whose sum is σ = 2618598576. Its totient is φ = 2463334272.

The previous prime is 2540534981. The next prime is 2540535001. The reversal of 2540534987 is 7894350452.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2540534987 - 2⁶ = 2540534923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2540534981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209738 + ... + 221519.

It is an arithmetic number, because the mean of its divisors is an integer number (327324822).

Almost surely, 2^2540534987 is an apocalyptic number.

2540534987 is a deficient number, since it is larger than the sum of its proper divisors (78063589).

2540534987 is a wasteful number, since it uses less digits than its factorization.

2540534987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431437.

The product of its (nonzero) digits is 1209600, while the sum is 47.

The square root of 2540534987 is about 50403.7199718433. The cubic root of 2540534987 is about 1364.5047758296.

The spelling of 2540534987 in words is "two billion, five hundred forty million, five hundred thirty-four thousand, nine hundred eighty-seven".