223821464 has 16 divisors (see below), whose sum is σ = 437911920. Its totient is φ = 107044960.

The previous prime is 223821461. The next prime is 223821467. The reversal of 223821464 is 464128322.

It is an interprime number because it is at equal distance from previous prime (223821461) and next prime (223821467).

It is a self number, because there is not a number n which added to its sum of digits gives 223821464.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223821461) 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, 608027 + ... + 608394.

It is an arithmetic number, because the mean of its divisors is an integer number (27369495).

Almost surely, 2^223821464 is an apocalyptic number.

It is an amenable number.

223821464 is a deficient number, since it is larger than the sum of its proper divisors (214090456).

223821464 is a wasteful number, since it uses less digits than its factorization.

223821464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216450 (or 1216446 counting only the distinct ones).

The product of its digits is 18432, while the sum is 32.

The square root of 223821464 is about 14960.6638890124. The cubic root of 223821464 is about 607.1564001645.

Adding to 223821464 its reverse (464128322), we get a palindrome (687949786).

The spelling of 223821464 in words is "two hundred twenty-three million, eight hundred twenty-one thousand, four hundred sixty-four".