22540212061 has 16 divisors (see below), whose sum is σ = 22831177600. Its totient is φ = 22251552768.

The previous prime is 22540212047. The next prime is 22540212089. The reversal of 22540212061 is 16021204522.

It is a 10-Lehmer number, since φ(22540212061) divides (22540212061-1)¹⁰.

It is a cyclic number.

It is not a de Polignac number, because 22540212061 - 2¹³ = 22540203869 is a prime.

It is a super-2 number, since 2×22540212061² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22540212661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29310685 + ... + 29311453.

It is an arithmetic number, because the mean of its divisors is an integer number (1426948600).

Almost surely, 2^22540212061 is an apocalyptic number.

It is an amenable number.

22540212061 is a deficient number, since it is larger than the sum of its proper divisors (290965539).

22540212061 is a wasteful number, since it uses less digits than its factorization.

22540212061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 22540212061 its reverse (16021204522), we get a palindrome (38561416583).

The spelling of 22540212061 in words is "twenty-two billion, five hundred forty million, two hundred twelve thousand, sixty-one".