222145724 has 12 divisors (see below), whose sum is σ = 389858784. Its totient is φ = 110757504.

The previous prime is 222145711. The next prime is 222145727. The reversal of 222145724 is 427541222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222145727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77252 + ... + 80075.

It is an arithmetic number, because the mean of its divisors is an integer number (32488232).

Almost surely, 2^222145724 is an apocalyptic number.

It is an amenable number.

222145724 is a deficient number, since it is larger than the sum of its proper divisors (167713060).

222145724 is a wasteful number, since it uses less digits than its factorization.

222145724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157684 (or 157682 counting only the distinct ones).

The product of its digits is 8960, while the sum is 29.

The square root of 222145724 is about 14904.5538007684. The cubic root of 222145724 is about 605.6373530531.

Adding to 222145724 its reverse (427541222), we get a palindrome (649686946).

The spelling of 222145724 in words is "two hundred twenty-two million, one hundred forty-five thousand, seven hundred twenty-four".