202143302440 has 32 divisors (see below), whose sum is σ = 455312097000. Its totient is φ = 80770269184.

The previous prime is 202143302407. The next prime is 202143302441. The reversal of 202143302440 is 44203341202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 33733199556 + 168410102884 = 183666^2 + 410378^2 .

It is not an unprimeable number, because it can be changed into a prime (202143302441) 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, 2682745 + ... + 2757064.

Almost surely, 2^202143302440 is an apocalyptic number.

202143302440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202143302440 is an abundant number, since it is smaller than the sum of its proper divisors (253168794560).

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

202143302440 is a wasteful number, since it uses less digits than its factorization.

202143302440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5440749 (or 5440745 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 202143302440 its reverse (44203341202), we get a palindrome (246346643642).

The spelling of 202143302440 in words is "two hundred two billion, one hundred forty-three million, three hundred two thousand, four hundred forty".