256202322100 has 18 divisors (see below), whose sum is σ = 555959039174. Its totient is φ = 102480928800.

The previous prime is 256202322083. The next prime is 256202322109. The reversal of 256202322100 is 1223202652.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 291794724 + 255910527376 = 17082^2 + 505876^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256202322109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1281011511 + ... + 1281011710.

Almost surely, 2^256202322100 is an apocalyptic number.

256202322100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256202322100 is an abundant number, since it is smaller than the sum of its proper divisors (299756717074).

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

256202322100 is a wasteful number, since it uses less digits than its factorization.

256202322100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2562023235 (or 2562023228 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 256202322100 its reverse (1223202652), we get a palindrome (257425524752).

The spelling of 256202322100 in words is "two hundred fifty-six billion, two hundred two million, three hundred twenty-two thousand, one hundred".