203040555100 has 36 divisors (see below), whose sum is σ = 441481075000. Its totient is φ = 81053444160.

The previous prime is 203040555097. The next prime is 203040555121. The reversal of 203040555100 is 1555040302.

It is a super-2 number, since 2×203040555100² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1984575 + ... + 2084374.

Almost surely, 2^203040555100 is an apocalyptic number.

203040555100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203040555100 is an abundant number, since it is smaller than the sum of its proper divisors (238440519900).

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

203040555100 is a wasteful number, since it uses less digits than its factorization.

203040555100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4069462 (or 4069455 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

Adding to 203040555100 its reverse (1555040302), we get a palindrome (204595595402).

The spelling of 203040555100 in words is "two hundred three billion, forty million, five hundred fifty-five thousand, one hundred".