221854452 has 24 divisors (see below), whose sum is σ = 518050176. Its totient is φ = 73895808.

The previous prime is 221854447. The next prime is 221854459. The reversal of 221854452 is 254458122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221854459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11628 + ... + 24060.

It is an arithmetic number, because the mean of its divisors is an integer number (21585424).

Almost surely, 2^221854452 is an apocalyptic number.

It is an amenable number.

221854452 is an abundant number, since it is smaller than the sum of its proper divisors (296195724).

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

221854452 is a wasteful number, since it uses less digits than its factorization.

221854452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13927 (or 13925 counting only the distinct ones).

The product of its digits is 25600, while the sum is 33.

The square root of 221854452 is about 14894.7793538542. The cubic root of 221854452 is about 605.3725383547.

The spelling of 221854452 in words is "two hundred twenty-one million, eight hundred fifty-four thousand, four hundred fifty-two".