101223556 has 48 divisors (see below), whose sum is σ = 210230272. Its totient is φ = 41731200.

The previous prime is 101223541. The next prime is 101223581. The reversal of 101223556 is 655322101.

It is a self number, because there is not a number n which added to its sum of digits gives 101223556.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240226 + ... + 240646.

Almost surely, 2^101223556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 101223556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105115136).

101223556 is an abundant number, since it is smaller than the sum of its proper divisors (109006716).

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

101223556 is a wasteful number, since it uses less digits than its factorization.

101223556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740 (or 738 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 101223556 is about 10060.9918000165. The cubic root of 101223556 is about 466.0442957396.

Adding to 101223556 its reverse (655322101), we get a palindrome (756545657).

The spelling of 101223556 in words is "one hundred one million, two hundred twenty-three thousand, five hundred fifty-six".