221146630 has 16 divisors (see below), whose sum is σ = 398801520. Its totient is φ = 88294752.

The previous prime is 221146619. The next prime is 221146649. The reversal of 221146630 is 36641122.

221146630 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 = 221146595 and 221146604.

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, 14745 + ... + 25684.

It is an arithmetic number, because the mean of its divisors is an integer number (24925095).

Almost surely, 2^221146630 is an apocalyptic number.

221146630 is a deficient number, since it is larger than the sum of its proper divisors (177654890).

221146630 is a wasteful number, since it uses less digits than its factorization.

221146630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40983.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 221146630 is about 14870.9996301526. Note that the first 3 decimals coincide. The cubic root of 221146630 is about 604.7280429675.

Adding to 221146630 its reverse (36641122), we get a palindrome (257787752).

It can be divided in two parts, 2211 and 46630, that added together give a square (48841 = 221²).

The spelling of 221146630 in words is "two hundred twenty-one million, one hundred forty-six thousand, six hundred thirty".