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221320441 = 4313813727
BaseRepresentation
bin11010011000100…
…01010011111001
3120102110020120101
431030101103321
5423124223231
633543355401
75325123046
oct1514212371
9512406511
10221320441
11103a25361
1262152b61
1336b10754
14215721cd
151466b661
hexd3114f9

221320441 has 8 divisors (see below), whose sum is σ = 226692224. Its totient is φ = 215958960.

The previous prime is 221320427. The next prime is 221320447. The reversal of 221320441 is 144023122.

221320441 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 not a de Polignac number, because 221320441 - 27 = 221320313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221320447) 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, 57520 + ... + 61246.

It is an arithmetic number, because the mean of its divisors is an integer number (28336528).

Almost surely, 2221320441 is an apocalyptic number.

It is an amenable number.

221320441 is a deficient number, since it is larger than the sum of its proper divisors (5371783).

221320441 is a wasteful number, since it uses less digits than its factorization.

221320441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5151.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 221320441 is about 14876.8424405181. The cubic root of 221320441 is about 604.8864308829.

Adding to 221320441 its reverse (144023122), we get a palindrome (365343563).

The spelling of 221320441 in words is "two hundred twenty-one million, three hundred twenty thousand, four hundred forty-one".

Divisors: 1 43 1381 3727 59383 160261 5146987 221320441