223631220340 has 24 divisors (see below), whose sum is σ = 512318796192. Its totient is φ = 81320443680.

The previous prime is 223631220257. The next prime is 223631220341. The reversal of 223631220340 is 43022136322.

223631220340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 223631220299 and 223631220308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223631220341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 508252554 + ... + 508252993.

It is an arithmetic number, because the mean of its divisors is an integer number (21346616508).

Almost surely, 2^223631220340 is an apocalyptic number.

223631220340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223631220340 is an abundant number, since it is smaller than the sum of its proper divisors (288687575852).

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

223631220340 is a wasteful number, since it uses less digits than its factorization.

223631220340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016505567 (or 1016505565 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 223631220340 its reverse (43022136322), we get a palindrome (266653356662).

The spelling of 223631220340 in words is "two hundred twenty-three billion, six hundred thirty-one million, two hundred twenty thousand, three hundred forty".