221453016 has 64 divisors (see below), whose sum is σ = 611712000. Its totient is φ = 66451968.

The previous prime is 221453003. The next prime is 221453021. The reversal of 221453016 is 610354122.

221453016 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 2416 + ... + 21183.

It is an arithmetic number, because the mean of its divisors is an integer number (9558000).

Almost surely, 2^221453016 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 221453016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305856000).

221453016 is an abundant number, since it is smaller than the sum of its proper divisors (390258984).

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

221453016 is a wasteful number, since it uses less digits than its factorization.

221453016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23648 (or 23644 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 221453016 is about 14881.2975240736. The cubic root of 221453016 is about 605.0071861269.

The spelling of 221453016 in words is "two hundred twenty-one million, four hundred fifty-three thousand, sixteen".