221368435 has 4 divisors (see below), whose sum is σ = 265642128. Its totient is φ = 177094744.

The previous prime is 221368423. The next prime is 221368457. The reversal of 221368435 is 534863122.

221368435 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221368435 - 2¹⁷ = 221237363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221368435.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22136839 + ... + 22136848.

It is an arithmetic number, because the mean of its divisors is an integer number (66410532).

Almost surely, 2^221368435 is an apocalyptic number.

221368435 is a deficient number, since it is larger than the sum of its proper divisors (44273693).

221368435 is an equidigital number, since it uses as much as digits as its factorization.

221368435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44273692.

The product of its digits is 34560, while the sum is 34.

The square root of 221368435 is about 14878.4553969826. The cubic root of 221368435 is about 604.9301515336.

The spelling of 221368435 in words is "two hundred twenty-one million, three hundred sixty-eight thousand, four hundred thirty-five".