22501161 has 12 divisors (see below), whose sum is σ = 32610240. Its totient is φ = 14950680.

The previous prime is 22501151. The next prime is 22501163. The reversal of 22501161 is 16110522.

22501161 is a `hidden beast` number, since 2 + 2 + 501 + 161 = 666.

It is not a de Polignac number, because 22501161 - 2⁹ = 22500649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22501163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1221 + ... + 6818.

It is an arithmetic number, because the mean of its divisors is an integer number (2717520).

Almost surely, 2^22501161 is an apocalyptic number.

It is an amenable number.

22501161 is a deficient number, since it is larger than the sum of its proper divisors (10109079).

22501161 is a wasteful number, since it uses less digits than its factorization.

22501161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8356 (or 8353 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 22501161 is about 4743.5388688194. The cubic root of 22501161 is about 282.3156643267.

Adding to 22501161 its reverse (16110522), we get a palindrome (38611683).

The spelling of 22501161 in words is "twenty-two million, five hundred one thousand, one hundred sixty-one".