102220556 has 24 divisors (see below), whose sum is σ = 187941600. Its totient is φ = 48553472.

The previous prime is 102220553. The next prime is 102220571. The reversal of 102220556 is 655022201.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (102220553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9980 + ... + 17436.

It is an arithmetic number, because the mean of its divisors is an integer number (7830900).

Almost surely, 2^102220556 is an apocalyptic number.

It is an amenable number.

102220556 is a deficient number, since it is larger than the sum of its proper divisors (85721044).

102220556 is a wasteful number, since it uses less digits than its factorization.

102220556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7633 (or 7631 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 102220556 is about 10110.4181911531. The cubic root of 102220556 is about 467.5693984120.

Adding to 102220556 its reverse (655022201), we get a palindrome (757242757).

The spelling of 102220556 in words is "one hundred two million, two hundred twenty thousand, five hundred fifty-six".