222506145 has 12 divisors (see below), whose sum is σ = 385677396. Its totient is φ = 118669920.

The previous prime is 222506111. The next prime is 222506161. The reversal of 222506145 is 541605222.

222506145 is a `hidden beast` number, since 22 + 25 + 0 + 614 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 119443041 + 103063104 = 10929^2 + 10152^2 .

It is not a de Polignac number, because 222506145 - 2⁸ = 222505889 is a prime.

It is a super-2 number, since 2×222506145² = 99017969125522050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2472246 + ... + 2472335.

It is an arithmetic number, because the mean of its divisors is an integer number (32139783).

Almost surely, 2^222506145 is an apocalyptic number.

It is an amenable number.

222506145 is a deficient number, since it is larger than the sum of its proper divisors (163171251).

222506145 is a wasteful number, since it uses less digits than its factorization.

222506145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4944592 (or 4944589 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 222506145 is about 14916.6398696221. The cubic root of 222506145 is about 605.9647154569.

The spelling of 222506145 in words is "two hundred twenty-two million, five hundred six thousand, one hundred forty-five".