221550036 has 24 divisors (see below), whose sum is σ = 524033664. Its totient is φ = 72838080.

The previous prime is 221550023. The next prime is 221550047. The reversal of 221550036 is 630055122.

221550036 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 221549988 and 221550015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125580 + ... + 127331.

It is an arithmetic number, because the mean of its divisors is an integer number (21834736).

Almost surely, 2^221550036 is an apocalyptic number.

It is an amenable number.

221550036 is an abundant number, since it is smaller than the sum of its proper divisors (302483628).

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

221550036 is a wasteful number, since it uses less digits than its factorization.

221550036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252991 (or 252989 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 221550036 is about 14884.5569635109. The cubic root of 221550036 is about 605.0955257491.

The spelling of 221550036 in words is "two hundred twenty-one million, five hundred fifty thousand, thirty-six".