203144240 has 80 divisors (see below), whose sum is σ = 525133056. Its totient is φ = 72576000.

The previous prime is 203144239. The next prime is 203144309. The reversal of 203144240 is 42441302.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29090 + ... + 35390.

Almost surely, 2^203144240 is an apocalyptic number.

203144240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203144240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262566528).

203144240 is an abundant number, since it is smaller than the sum of its proper divisors (321988816).

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

203144240 is a wasteful number, since it uses less digits than its factorization.

203144240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6358 (or 6352 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 203144240 is about 14252.8677816080. The cubic root of 203144240 is about 587.8522312127.

Adding to 203144240 its reverse (42441302), we get a palindrome (245585542).

The spelling of 203144240 in words is "two hundred three million, one hundred forty-four thousand, two hundred forty".