223522420 has 24 divisors (see below), whose sum is σ = 512070048. Its totient is φ = 81280800.

The previous prime is 223522417. The next prime is 223522421. The reversal of 223522420 is 24225322.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 223522391 and 223522400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223522421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 507786 + ... + 508225.

It is an arithmetic number, because the mean of its divisors is an integer number (21336252).

Almost surely, 2^223522420 is an apocalyptic number.

223522420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223522420 is an abundant number, since it is smaller than the sum of its proper divisors (288547628).

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

223522420 is a wasteful number, since it uses less digits than its factorization.

223522420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016031 (or 1016029 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 223522420 is about 14950.6662058920. Note that the first 3 decimals coincide. The cubic root of 223522420 is about 606.8858759143.

Adding to 223522420 its reverse (24225322), we get a palindrome (247747742).

The spelling of 223522420 in words is "two hundred twenty-three million, five hundred twenty-two thousand, four hundred twenty".