222506131 has 16 divisors (see below), whose sum is σ = 241666560. Its totient is φ = 204184800.

The previous prime is 222506111. The next prime is 222506161. The reversal of 222506131 is 131605222.

It is a cyclic number.

It is not a de Polignac number, because 222506131 - 2¹⁹ = 221981843 is a prime.

It is a super-2 number, since 2×222506131² = 99017956665178322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222506111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88960 + ... + 91426.

It is an arithmetic number, because the mean of its divisors is an integer number (15104160).

Almost surely, 2^222506131 is an apocalyptic number.

222506131 is a deficient number, since it is larger than the sum of its proper divisors (19160429).

222506131 is a wasteful number, since it uses less digits than its factorization.

222506131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2634.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 222506131 is about 14916.6394003475. The cubic root of 222506131 is about 605.9647027479.

Subtracting from 222506131 its reverse (131605222), we obtain a palindrome (90900909).

The spelling of 222506131 in words is "two hundred twenty-two million, five hundred six thousand, one hundred thirty-one".