2540215155021 has 32 divisors (see below), whose sum is σ = 3525189773952. Its totient is φ = 1625864970240.

The previous prime is 2540215155019. The next prime is 2540215155103. The reversal of 2540215155021 is 1205515120452.

It is not a de Polignac number, because 2540215155021 - 2¹ = 2540215155019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540215155001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2298861 + ... + 3219501.

It is an arithmetic number, because the mean of its divisors is an integer number (110162180436).

Almost surely, 2^{2540215155021} is an apocalyptic number.

It is an amenable number.

2540215155021 is a deficient number, since it is larger than the sum of its proper divisors (984974618931).

2540215155021 is a wasteful number, since it uses less digits than its factorization.

2540215155021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921053.

The product of its (nonzero) digits is 20000, while the sum is 33.

The spelling of 2540215155021 in words is "two trillion, five hundred forty billion, two hundred fifteen million, one hundred fifty-five thousand, twenty-one".