255500100 has 108 divisors (see below), whose sum is σ = 835738176. Its totient is φ = 65165760.

The previous prime is 255500081. The next prime is 255500117. The reversal of 255500100 is 1005552.

It is a super-2 number, since 2×255500100² = 130560602200020000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 14529 + ... + 26871.

Almost surely, 2^255500100 is an apocalyptic number.

255500100 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 255500100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (417869088).

255500100 is an abundant number, since it is smaller than the sum of its proper divisors (580238076).

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

255500100 is a wasteful number, since it uses less digits than its factorization.

255500100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12386 (or 12376 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 18.

The square root of 255500100 is about 15984.3704912017. The cubic root of 255500100 is about 634.5468484579.

Adding to 255500100 its reverse (1005552), we get a palindrome (256505652).

The spelling of 255500100 in words is "two hundred fifty-five million, five hundred thousand, one hundred".