222540505 has 32 divisors (see below), whose sum is σ = 299230848. Its totient is φ = 157516800.

The previous prime is 222540499. The next prime is 222540509. The reversal of 222540505 is 505045222.

It is a happy number.

It is not a de Polignac number, because 222540505 - 2¹⁷ = 222409433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222540505.

It is not an unprimeable number, because it can be changed into a prime (222540509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 378822 + ... + 379408.

It is an arithmetic number, because the mean of its divisors is an integer number (9350964).

Almost surely, 2^222540505 is an apocalyptic number.

It is an amenable number.

222540505 is a deficient number, since it is larger than the sum of its proper divisors (76690343).

222540505 is a wasteful number, since it uses less digits than its factorization.

222540505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777.

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 222540505 is about 14917.7915590747. The cubic root of 222540505 is about 605.9959054210.

Adding to 222540505 its reverse (505045222), we get a palindrome (727585727).

The spelling of 222540505 in words is "two hundred twenty-two million, five hundred forty thousand, five hundred five".