203213140 has 24 divisors (see below), whose sum is σ = 459574920. Its totient is φ = 75032448.

The previous prime is 203213137. The next prime is 203213149. The reversal of 203213140 is 41312302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 93636 + 203119504 = 306^2 + 14252^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203213149) 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, 390535 + ... + 391054.

It is an arithmetic number, because the mean of its divisors is an integer number (19148955).

Almost surely, 2^203213140 is an apocalyptic number.

203213140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203213140 is an abundant number, since it is smaller than the sum of its proper divisors (256361780).

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

203213140 is a wasteful number, since it uses less digits than its factorization.

203213140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781611 (or 781609 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 203213140 is about 14255.2846341278. The cubic root of 203213140 is about 587.9186838976.

Adding to 203213140 its reverse (41312302), we get a palindrome (244525442).

The spelling of 203213140 in words is "two hundred three million, two hundred thirteen thousand, one hundred forty".