40222161 has 24 divisors (see below), whose sum is σ = 66655680. Its totient is φ = 22895136.

The previous prime is 40222141. The next prime is 40222163. The reversal of 40222161 is 16122204.

It is not a de Polignac number, because 40222161 - 2⁷ = 40222033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40222163) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17370 + ... + 19548.

It is an arithmetic number, because the mean of its divisors is an integer number (2777320).

Almost surely, 2^40222161 is an apocalyptic number.

It is an amenable number.

40222161 is a deficient number, since it is larger than the sum of its proper divisors (26433519).

40222161 is a wasteful number, since it uses less digits than its factorization.

40222161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2485 (or 2482 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 40222161 is about 6342.0943701588. The cubic root of 40222161 is about 342.6271707058.

Adding to 40222161 its reverse (16122204), we get a palindrome (56344365).

The spelling of 40222161 in words is "forty million, two hundred twenty-two thousand, one hundred sixty-one".