2540365531 has 8 divisors (see below), whose sum is σ = 2917166400. Its totient is φ = 2187874440.

The previous prime is 2540365511. The next prime is 2540365549. The reversal of 2540365531 is 1355630452.

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 2540365531 - 2²¹ = 2538268379 is a prime.

It is a super-2 number, since 2×2540365531² = 12906914062185823922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2540365511) 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, 6077221 + ... + 6077638.

It is an arithmetic number, because the mean of its divisors is an integer number (364645800).

Almost surely, 2^2540365531 is an apocalyptic number.

2540365531 is a deficient number, since it is larger than the sum of its proper divisors (376800869).

2540365531 is a wasteful number, since it uses less digits than its factorization.

2540365531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12154889.

The product of its (nonzero) digits is 54000, while the sum is 34.

The square root of 2540365531 is about 50402.0389567724. The cubic root of 2540365531 is about 1364.4744372508.

Adding to 2540365531 its reverse (1355630452), we get a palindrome (3895995983).

The spelling of 2540365531 in words is "two billion, five hundred forty million, three hundred sixty-five thousand, five hundred thirty-one".