221211032 has 16 divisors (see below), whose sum is σ = 474023760. Its totient is φ = 94804704.

The previous prime is 221211017. The next prime is 221211037. The reversal of 221211032 is 230112122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 221210998 and 221211016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221211037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1975043 + ... + 1975154.

It is an arithmetic number, because the mean of its divisors is an integer number (29626485).

Almost surely, 2^221211032 is an apocalyptic number.

It is an amenable number.

221211032 is an abundant number, since it is smaller than the sum of its proper divisors (252812728).

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

221211032 is a wasteful number, since it uses less digits than its factorization.

221211032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3950210 (or 3950206 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 221211032 is about 14873.1648279712. The cubic root of 221211032 is about 604.7867399438.

Adding to 221211032 its reverse (230112122), we get a palindrome (451323154).

The spelling of 221211032 in words is "two hundred twenty-one million, two hundred eleven thousand, thirty-two".