220553391 has 8 divisors (see below), whose sum is σ = 301243824. Its totient is φ = 143449280.

The previous prime is 220553363. The next prime is 220553413. The reversal of 220553391 is 193355022.

220553391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220553391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220553351) 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, 896436 + ... + 896681.

It is an arithmetic number, because the mean of its divisors is an integer number (37655478).

Almost surely, 2^220553391 is an apocalyptic number.

220553391 is a deficient number, since it is larger than the sum of its proper divisors (80690433).

220553391 is a wasteful number, since it uses less digits than its factorization.

220553391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1793161.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 220553391 is about 14851.0400645881. The cubic root of 220553391 is about 604.1868190651.

The spelling of 220553391 in words is "two hundred twenty million, five hundred fifty-three thousand, three hundred ninety-one".