221453144 has 16 divisors (see below), whose sum is σ = 452972520. Its totient is φ = 100660480.

The previous prime is 221453129. The next prime is 221453149. The reversal of 221453144 is 441354122.

221453144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221453149) 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, 1258169 + ... + 1258344.

Almost surely, 2^221453144 is an apocalyptic number.

It is an amenable number.

221453144 is an abundant number, since it is smaller than the sum of its proper divisors (231519376).

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

221453144 is a wasteful number, since it uses less digits than its factorization.

221453144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2516530 (or 2516526 counting only the distinct ones).

The product of its digits is 3840, while the sum is 26.

The square root of 221453144 is about 14881.3018247733. The cubic root of 221453144 is about 605.0073026917.

The spelling of 221453144 in words is "two hundred twenty-one million, four hundred fifty-three thousand, one hundred forty-four".