223640532 has 36 divisors (see below), whose sum is σ = 570509940. Its totient is φ = 73861632.

The previous prime is 223640531. The next prime is 223640533. The reversal of 223640532 is 235046322.

223640532 is a `hidden beast` number, since 223 + 6 + 405 + 32 = 666.

It is an interprime number because it is at equal distance from previous prime (223640531) and next prime (223640533).

It can be written as a sum of positive squares in 2 ways, for example, as 170145936 + 53494596 = 13044^2 + 7314^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 223640496 and 223640505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223640531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24573 + ... + 32420.

Almost surely, 2^223640532 is an apocalyptic number.

It is an amenable number.

223640532 is an abundant number, since it is smaller than the sum of its proper divisors (346869408).

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

223640532 is a wasteful number, since it uses less digits than its factorization.

223640532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57112 (or 57107 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 223640532 is about 14954.6157423051. The cubic root of 223640532 is about 606.9927524156.

Adding to 223640532 its reverse (235046322), we get a palindrome (458686854).

The spelling of 223640532 in words is "two hundred twenty-three million, six hundred forty thousand, five hundred thirty-two".