22540542501521 has 16 divisors (see below), whose sum is σ = 24880158002880. Its totient is φ = 20249602264320.

The previous prime is 22540542501479. The next prime is 22540542501557. The reversal of 22540542501521 is 12510524504522.

It is not a de Polignac number, because 22540542501521 - 2³⁰ = 22539468759697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22540532501521) 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, 4850855 + ... + 8283228.

It is an arithmetic number, because the mean of its divisors is an integer number (1555009875180).

Almost surely, 2^{22540542501521} is an apocalyptic number.

It is an amenable number.

22540542501521 is a deficient number, since it is larger than the sum of its proper divisors (2339615501359).

22540542501521 is a wasteful number, since it uses less digits than its factorization.

22540542501521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13135936.

The product of its (nonzero) digits is 160000, while the sum is 38.

The spelling of 22540542501521 in words is "twenty-two trillion, five hundred forty billion, five hundred forty-two million, five hundred one thousand, five hundred twenty-one".