221153454 has 24 divisors (see below), whose sum is σ = 480210120. Its totient is φ = 73557168.

The previous prime is 221153447. The next prime is 221153503. The reversal of 221153454 is 454351122.

221153454 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221153454² = 97817700432260232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4749 + ... + 21560.

It is an arithmetic number, because the mean of its divisors is an integer number (20008755).

Almost surely, 2^221153454 is an apocalyptic number.

221153454 is an abundant number, since it is smaller than the sum of its proper divisors (259056666).

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

221153454 is a wasteful number, since it uses less digits than its factorization.

221153454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26784 (or 26781 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 221153454 is about 14871.2290682378. The cubic root of 221153454 is about 604.7342630061.

It can be divided in two parts, 22 and 1153454, that added together give a square (1153476 = 1074²).

The spelling of 221153454 in words is "two hundred twenty-one million, one hundred fifty-three thousand, four hundred fifty-four".