202143321240 has 128 divisors (see below), whose sum is σ = 693157685760. Its totient is φ = 46197863424.

The previous prime is 202143321199. The next prime is 202143321241. The reversal of 202143321240 is 42123341202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 202143321240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202143321241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9176079 + ... + 9198081.

It is an arithmetic number, because the mean of its divisors is an integer number (5415294420).

Almost surely, 2^202143321240 is an apocalyptic number.

202143321240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202143321240 is an abundant number, since it is smaller than the sum of its proper divisors (491014364520).

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

202143321240 is a wasteful number, since it uses less digits than its factorization.

202143321240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32961 (or 32957 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 202143321240 its reverse (42123341202), we get a palindrome (244266662442).

The spelling of 202143321240 in words is "two hundred two billion, one hundred forty-three million, three hundred twenty-one thousand, two hundred forty".