102205556 has 6 divisors (see below), whose sum is σ = 178859730. Its totient is φ = 51102776.

The previous prime is 102205549. The next prime is 102205567. The reversal of 102205556 is 655502201.

It can be written as a sum of positive squares in only one way, i.e., 72829156 + 29376400 = 8534^2 + 5420^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12775691 + ... + 12775698.

It is an arithmetic number, because the mean of its divisors is an integer number (29809955).

Almost surely, 2^102205556 is an apocalyptic number.

It is an amenable number.

102205556 is a deficient number, since it is larger than the sum of its proper divisors (76654174).

102205556 is a wasteful number, since it uses less digits than its factorization.

102205556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25551393 (or 25551391 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 102205556 is about 10109.6763548592. The cubic root of 102205556 is about 467.5465266781.

Adding to 102205556 its reverse (655502201), we get a palindrome (757707757).

The spelling of 102205556 in words is "one hundred two million, two hundred five thousand, five hundred fifty-six".