220171380 has 192 divisors, whose sum is σ = 736985088. Its totient is φ = 48407040.

The previous prime is 220171351. The next prime is 220171397. The reversal of 220171380 is 83171022.

It is a super-2 number, since 2×220171380² = 96950873142208800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 220171380.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 574669 + ... + 575051.

It is an arithmetic number, because the mean of its divisors is an integer number (3838464).

Almost surely, 2^220171380 is an apocalyptic number.

220171380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220171380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (368492544).

220171380 is an abundant number, since it is smaller than the sum of its proper divisors (516813708).

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

220171380 is a wasteful number, since it uses less digits than its factorization.

220171380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486 (or 484 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 220171380 is about 14838.1730681375. The cubic root of 220171380 is about 603.8377888452.

The spelling of 220171380 in words is "two hundred twenty million, one hundred seventy-one thousand, three hundred eighty".