221023454 has 8 divisors (see below), whose sum is σ = 331598280. Its totient is φ = 110490696.

The previous prime is 221023427. The next prime is 221023457. The reversal of 221023454 is 454320122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221023457) 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, 15092 + ... + 25880.

It is an arithmetic number, because the mean of its divisors is an integer number (41449785).

Almost surely, 2^221023454 is an apocalyptic number.

221023454 is a deficient number, since it is larger than the sum of its proper divisors (110574826).

221023454 is a wasteful number, since it uses less digits than its factorization.

221023454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21034.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 221023454 is about 14866.8575697758. The cubic root of 221023454 is about 604.6157467121.

Adding to 221023454 its reverse (454320122), we get a palindrome (675343576).

The spelling of 221023454 in words is "two hundred twenty-one million, twenty-three thousand, four hundred fifty-four".