203135540 has 48 divisors (see below), whose sum is σ = 446681088. Its totient is φ = 77451264.

The previous prime is 203135521. The next prime is 203135579. The reversal of 203135540 is 45531302.

It is a super-2 number, since 2×203135540² = 82528095222183200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

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, 175604 + ... + 176756.

It is an arithmetic number, because the mean of its divisors is an integer number (9305856).

Almost surely, 2^203135540 is an apocalyptic number.

203135540 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 203135540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223340544).

203135540 is an abundant number, since it is smaller than the sum of its proper divisors (243545548).

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

203135540 is a wasteful number, since it uses less digits than its factorization.

203135540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1568 (or 1566 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 203135540 is about 14252.5625766035. The cubic root of 203135540 is about 587.8438391667.

Adding to 203135540 its reverse (45531302), we get a palindrome (248666842).

The spelling of 203135540 in words is "two hundred three million, one hundred thirty-five thousand, five hundred forty".