220521140 has 24 divisors (see below), whose sum is σ = 529251072. Its totient is φ = 75607200.

The previous prime is 220521139. The next prime is 220521143. The reversal of 220521140 is 41125022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220521143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 787436 + ... + 787715.

It is an arithmetic number, because the mean of its divisors is an integer number (22052128).

Almost surely, 2^220521140 is an apocalyptic number.

220521140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220521140 is an abundant number, since it is smaller than the sum of its proper divisors (308729932).

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

220521140 is a wasteful number, since it uses less digits than its factorization.

220521140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1575167 (or 1575165 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 220521140 is about 14849.9542086836. The cubic root of 220521140 is about 604.1573680271.

Adding to 220521140 its reverse (41125022), we get a palindrome (261646162).

The spelling of 220521140 in words is "two hundred twenty million, five hundred twenty-one thousand, one hundred forty".