223431240 has 32 divisors (see below), whose sum is σ = 670294080. Its totient is φ = 59581632.

The previous prime is 223431239. The next prime is 223431259. The reversal of 223431240 is 42134322.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 930844 + ... + 931083.

It is an arithmetic number, because the mean of its divisors is an integer number (20946690).

Almost surely, 2^223431240 is an apocalyptic number.

223431240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223431240 is an abundant number, since it is smaller than the sum of its proper divisors (446862840).

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

223431240 is a wasteful number, since it uses less digits than its factorization.

223431240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1861941 (or 1861937 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 223431240 is about 14947.6165324108. The cubic root of 223431240 is about 606.8033437308.

Adding to 223431240 its reverse (42134322), we get a palindrome (265565562).

The spelling of 223431240 in words is "two hundred twenty-three million, four hundred thirty-one thousand, two hundred forty".