220459391 has 4 divisors (see below), whose sum is σ = 220715712. Its totient is φ = 220203072.

The previous prime is 220459381. The next prime is 220459397. The reversal of 220459391 is 193954022.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220459391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220459397) 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, 126866 + ... + 128591.

It is an arithmetic number, because the mean of its divisors is an integer number (55178928).

Almost surely, 2^220459391 is an apocalyptic number.

220459391 is a deficient number, since it is larger than the sum of its proper divisors (256321).

220459391 is an equidigital number, since it uses as much as digits as its factorization.

220459391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256320.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 220459391 is about 14847.8749657990. The cubic root of 220459391 is about 604.1009719283.

The spelling of 220459391 in words is "two hundred twenty million, four hundred fifty-nine thousand, three hundred ninety-one".