202143144 has 32 divisors (see below), whose sum is σ = 577552320. Its totient is φ = 57755136.

The previous prime is 202143143. The next prime is 202143167. The reversal of 202143144 is 441341202.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 202143144.

It is not an unprimeable number, because it can be changed into a prime (202143143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 601449 + ... + 601784.

It is an arithmetic number, because the mean of its divisors is an integer number (18048510).

Almost surely, 2^202143144 is an apocalyptic number.

202143144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

202143144 is an abundant number, since it is smaller than the sum of its proper divisors (375409176).

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

202143144 is a wasteful number, since it uses less digits than its factorization.

202143144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203249 (or 1203245 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 202143144 is about 14217.7053000827. The cubic root of 202143144 is about 586.8849942101.

Adding to 202143144 its reverse (441341202), we get a palindrome (643484346).

The spelling of 202143144 in words is "two hundred two million, one hundred forty-three thousand, one hundred forty-four".