22151606161 has 4 divisors (see below), whose sum is σ = 22239859824. Its totient is φ = 22063352500.

The previous prime is 22151606137. The next prime is 22151606173. The reversal of 22151606161 is 16160615122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16160615122 = 2 ⋅8080307561.

It is a cyclic number.

It is not a de Polignac number, because 22151606161 - 2⁹ = 22151605649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22151606131) 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, 44126455 + ... + 44126956.

It is an arithmetic number, because the mean of its divisors is an integer number (5559964956).

Almost surely, 2^22151606161 is an apocalyptic number.

It is an amenable number.

22151606161 is a deficient number, since it is larger than the sum of its proper divisors (88253663).

22151606161 is an equidigital number, since it uses as much as digits as its factorization.

22151606161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88253662.

The product of its (nonzero) digits is 4320, while the sum is 31.

The spelling of 22151606161 in words is "twenty-two billion, one hundred fifty-one million, six hundred six thousand, one hundred sixty-one".