222545131 has 4 divisors (see below), whose sum is σ = 222839872. Its totient is φ = 222250392.

The previous prime is 222545053. The next prime is 222545137. The reversal of 222545131 is 131545222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 222545131 - 2⁷ = 222545003 is a prime.

It is a super-2 number, since 2×222545131² = 99052670663614322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222545096 and 222545105.

It is not an unprimeable number, because it can be changed into a prime (222545137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146235 + ... + 147748.

It is an arithmetic number, because the mean of its divisors is an integer number (55709968).

Almost surely, 2^222545131 is an apocalyptic number.

222545131 is a deficient number, since it is larger than the sum of its proper divisors (294741).

222545131 is an equidigital number, since it uses as much as digits as its factorization.

222545131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294740.

The product of its digits is 2400, while the sum is 25.

The square root of 222545131 is about 14917.9466080289. The cubic root of 222545131 is about 606.0001043834. Note that the first 3 decimals are identical.

Subtracting from 222545131 its reverse (131545222), we obtain a palindrome (90999909).

The spelling of 222545131 in words is "two hundred twenty-two million, five hundred forty-five thousand, one hundred thirty-one".