221454523 has 2 divisors, whose sum is σ = 221454524. Its totient is φ = 221454522.

The previous prime is 221454521. The next prime is 221454533. The reversal of 221454523 is 325454122.

221454523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221454523 - 2¹ = 221454521 is a prime.

Together with 221454521, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 221454491 and 221454500.

It is not a weakly prime, because it can be changed into another prime (221454521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110727261 + 110727262.

It is an arithmetic number, because the mean of its divisors is an integer number (110727262).

Almost surely, 2^221454523 is an apocalyptic number.

221454523 is a deficient number, since it is larger than the sum of its proper divisors (1).

221454523 is an equidigital number, since it uses as much as digits as its factorization.

221454523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9600, while the sum is 28.

The square root of 221454523 is about 14881.3481580131. The cubic root of 221454523 is about 605.0085584929.

It can be divided in two parts, 2 and 21454523, that added together give a triangular number (21454525 = T₆₅₅₀).

The spelling of 221454523 in words is "two hundred twenty-one million, four hundred fifty-four thousand, five hundred twenty-three".