201143220 has 24 divisors (see below), whose sum is σ = 563201184. Its totient is φ = 53638176.

The previous prime is 201143209. The next prime is 201143231. The reversal of 201143220 is 22341102.

It is an interprime number because it is at equal distance from previous prime (201143209) and next prime (201143231).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 201143220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1676134 + ... + 1676253.

It is an arithmetic number, because the mean of its divisors is an integer number (23466716).

Almost surely, 2^201143220 is an apocalyptic number.

201143220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201143220 is an abundant number, since it is smaller than the sum of its proper divisors (362057964).

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

201143220 is a wasteful number, since it uses less digits than its factorization.

201143220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3352399 (or 3352397 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 201143220 is about 14182.4969592805. The cubic root of 201143220 is about 585.9156964616.

Adding to 201143220 its reverse (22341102), we get a palindrome (223484322).

The spelling of 201143220 in words is "two hundred one million, one hundred forty-three thousand, two hundred twenty".