22520451161 has 4 divisors (see below), whose sum is σ = 24252793572. Its totient is φ = 20788108752.

The previous prime is 22520451139. The next prime is 22520451181. The reversal of 22520451161 is 16115402522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16115402522 = 2 ⋅8057701261.

It can be written as a sum of positive squares in 2 ways, for example, as 10955599561 + 11564851600 = 104669^2 + 107540^2 .

It is a cyclic number.

It is not a de Polignac number, because 22520451161 - 2⁶ = 22520451097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22520451181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 866171186 + ... + 866171211.

It is an arithmetic number, because the mean of its divisors is an integer number (6063198393).

Almost surely, 2^22520451161 is an apocalyptic number.

It is an amenable number.

22520451161 is a deficient number, since it is larger than the sum of its proper divisors (1732342411).

22520451161 is a wasteful number, since it uses less digits than its factorization.

22520451161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1732342410.

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 22520451161 its reverse (16115402522), we get a palindrome (38635853683).

The spelling of 22520451161 in words is "twenty-two billion, five hundred twenty million, four hundred fifty-one thousand, one hundred sixty-one".