221415132 has 96 divisors (see below), whose sum is σ = 563915520. Its totient is φ = 67392000.

The previous prime is 221415107. The next prime is 221415143. The reversal of 221415132 is 231514122.

221415132 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 = 221415099 and 221415108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 882007 + ... + 882257.

It is an arithmetic number, because the mean of its divisors is an integer number (5874120).

Almost surely, 2^221415132 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 221415132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281957760).

221415132 is an abundant number, since it is smaller than the sum of its proper divisors (342500388).

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

221415132 is a wasteful number, since it uses less digits than its factorization.

221415132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403 (or 401 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 221415132 is about 14880.0245967539. The cubic root of 221415132 is about 604.9726846033.

Adding to 221415132 its reverse (231514122), we get a palindrome (452929254).

The spelling of 221415132 in words is "two hundred twenty-one million, four hundred fifteen thousand, one hundred thirty-two".