102205240 has 16 divisors (see below), whose sum is σ = 229961880. Its totient is φ = 40882080.

The previous prime is 102205189. The next prime is 102205247. The reversal of 102205240 is 42502201.

It is a super-2 number, since 2×102205240² = 20891822166915200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102205247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1277526 + ... + 1277605.

Almost surely, 2^102205240 is an apocalyptic number.

102205240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102205240 is an abundant number, since it is smaller than the sum of its proper divisors (127756640).

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

102205240 is a wasteful number, since it uses less digits than its factorization.

102205240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2555142 (or 2555138 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 102205240 is about 10109.6607262559. The cubic root of 102205240 is about 467.5460448228.

Adding to 102205240 its reverse (42502201), we get a palindrome (144707441).

The spelling of 102205240 in words is "one hundred two million, two hundred five thousand, two hundred forty".