221251032 has 48 divisors (see below), whose sum is σ = 600606240. Its totient is φ = 73579968.

The previous prime is 221251031. The next prime is 221251081. The reversal of 221251032 is 230152122.

It is a super-2 number, since 2×221251032² = 97904038322130048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 221250996 and 221251014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221251031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30018 + ... + 36654.

It is an arithmetic number, because the mean of its divisors is an integer number (12512630).

Almost surely, 2^221251032 is an apocalyptic number.

It is an amenable number.

221251032 is an abundant number, since it is smaller than the sum of its proper divisors (379355208).

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

221251032 is a wasteful number, since it uses less digits than its factorization.

221251032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7112 (or 7105 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 221251032 is about 14874.5094709036. The cubic root of 221251032 is about 604.8231908257.

The spelling of 221251032 in words is "two hundred twenty-one million, two hundred fifty-one thousand, thirty-two".