221025332 has 48 divisors (see below), whose sum is σ = 434693952. Its totient is φ = 97466880.

The previous prime is 221025323. The next prime is 221025341. The reversal of 221025332 is 233520122.

It is an interprime number because it is at equal distance from previous prime (221025323) and next prime (221025341).

It is a congruent number.

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, 372428 + ... + 373020.

It is an arithmetic number, because the mean of its divisors is an integer number (9056124).

Almost surely, 2^221025332 is an apocalyptic number.

221025332 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221025332 is a deficient number, since it is larger than the sum of its proper divisors (213668620).

221025332 is a wasteful number, since it uses less digits than its factorization.

221025332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848 (or 846 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 221025332 is about 14866.9207302656. The cubic root of 221025332 is about 604.6174591475.

Adding to 221025332 its reverse (233520122), we get a palindrome (454545454).

The spelling of 221025332 in words is "two hundred twenty-one million, twenty-five thousand, three hundred thirty-two".