222731340 has 48 divisors (see below), whose sum is σ = 671623008. Its totient is φ = 54825984.

The previous prime is 222731329. The next prime is 222731359. The reversal of 222731340 is 43137222.

It is a self number, because there is not a number n which added to its sum of digits gives 222731340.

It is an unprimeable number.

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, 141997 + ... + 143556.

It is an arithmetic number, because the mean of its divisors is an integer number (13992146).

Almost surely, 2^222731340 is an apocalyptic number.

222731340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222731340 is an abundant number, since it is smaller than the sum of its proper divisors (448891668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222731340 is a wasteful number, since it uses less digits than its factorization.

222731340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285578 (or 285576 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 222731340 is about 14924.1864099856. The cubic root of 222731340 is about 606.1690756759.

Adding to 222731340 its reverse (43137222), we get a palindrome (265868562).

The spelling of 222731340 in words is "two hundred twenty-two million, seven hundred thirty-one thousand, three hundred forty".