223520040 has 128 divisors (see below), whose sum is σ = 756432000. Its totient is φ = 58696704.

The previous prime is 223520039. The next prime is 223520041. The reversal of 223520040 is 40025322.

It is an interprime number because it is at equal distance from previous prime (223520039) and next prime (223520041).

It is a super-2 number, since 2×223520040² = 99922416563203200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 223519995 and 223520022.

It is not an unprimeable number, because it can be changed into a prime (223520041) 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, 70816 + ... + 73904.

It is an arithmetic number, because the mean of its divisors is an integer number (5909625).

Almost surely, 2^223520040 is an apocalyptic number.

223520040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 223520040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (378216000).

223520040 is an abundant number, since it is smaller than the sum of its proper divisors (532911960).

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

223520040 is a wasteful number, since it uses less digits than its factorization.

223520040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3176 (or 3166 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 223520040 is about 14950.5866105648. The cubic root of 223520040 is about 606.8837219268.

Adding to 223520040 its reverse (40025322), we get a palindrome (263545362).

The spelling of 223520040 in words is "two hundred twenty-three million, five hundred twenty thousand, forty".