102550221 has 6 divisors (see below), whose sum is σ = 148128110. Its totient is φ = 68366808.

The previous prime is 102550187. The next prime is 102550247. The reversal of 102550221 is 122055201.

It can be written as a sum of positive squares in only one way, i.e., 102515625 + 34596 = 10125^2 + 186^2 .

It is not a de Polignac number, because 102550221 - 2¹⁵ = 102517453 is a prime.

It is a super-3 number, since 3×102550221³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102550194 and 102550203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102550121) 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, 5697226 + ... + 5697243.

Almost surely, 2^102550221 is an apocalyptic number.

It is an amenable number.

102550221 is a deficient number, since it is larger than the sum of its proper divisors (45577889).

102550221 is a wasteful number, since it uses less digits than its factorization.

102550221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11394475 (or 11394472 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 102550221 is about 10126.7083003314. The cubic root of 102550221 is about 468.0715017862.

The spelling of 102550221 in words is "one hundred two million, five hundred fifty thousand, two hundred twenty-one".