222520340 has 24 divisors (see below), whose sum is σ = 534049152. Its totient is φ = 76292640.

The previous prime is 222520321. The next prime is 222520349. The reversal of 222520340 is 43025222.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222520349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 794576 + ... + 794855.

It is an arithmetic number, because the mean of its divisors is an integer number (22252048).

Almost surely, 2^222520340 is an apocalyptic number.

222520340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222520340 is an abundant number, since it is smaller than the sum of its proper divisors (311528812).

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

222520340 is a wasteful number, since it uses less digits than its factorization.

222520340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1589447 (or 1589445 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 222520340 is about 14917.1156729443. The cubic root of 222520340 is about 605.9776012227.

Adding to 222520340 its reverse (43025222), we get a palindrome (265545562).

The spelling of 222520340 in words is "two hundred twenty-two million, five hundred twenty thousand, three hundred forty".