220145140 has 12 divisors (see below), whose sum is σ = 462304836. Its totient is φ = 88058048.

The previous prime is 220145137. The next prime is 220145147. The reversal of 220145140 is 41541022.

It can be written as a sum of positive squares in 2 ways, for example, as 154405476 + 65739664 = 12426^2 + 8108^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220145147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5503609 + ... + 5503648.

It is an arithmetic number, because the mean of its divisors is an integer number (38525403).

Almost surely, 2^220145140 is an apocalyptic number.

220145140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220145140 is an abundant number, since it is smaller than the sum of its proper divisors (242159696).

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

220145140 is a wasteful number, since it uses less digits than its factorization.

220145140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11007266 (or 11007264 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 220145140 is about 14837.2888359026. The cubic root of 220145140 is about 603.8137994526.

Adding to 220145140 its reverse (41541022), we get a palindrome (261686162).

The spelling of 220145140 in words is "two hundred twenty million, one hundred forty-five thousand, one hundred forty".