255555203100 has 144 divisors (see below), whose sum is σ = 745216219776. Its totient is φ = 67614624000.

The previous prime is 255555203083. The next prime is 255555203117. The reversal of 255555203100 is 1302555552.

It is an interprime number because it is at equal distance from previous prime (255555203083) and next prime (255555203117).

It is a super-2 number, since 2×255555203100² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20946202 + ... + 20958398.

Almost surely, 2^255555203100 is an apocalyptic number.

255555203100 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 255555203100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (372608109888).

255555203100 is an abundant number, since it is smaller than the sum of its proper divisors (489661016676).

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

255555203100 is a wasteful number, since it uses less digits than its factorization.

255555203100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12756 (or 12749 counting only the distinct ones).

The product of its (nonzero) digits is 37500, while the sum is 33.

Adding to 255555203100 its reverse (1302555552), we get a palindrome (256857758652).

The spelling of 255555203100 in words is "two hundred fifty-five billion, five hundred fifty-five million, two hundred three thousand, one hundred".