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2013220405 = 5757520583
BaseRepresentation
bin111011111111111…
…0100111000110101
312012022020012012201
41313333310320311
513110341023110
6531434144501
7100614043150
oct16777647065
95168205181
102013220405
11943457319
12482282131
132611259a1
1415153ac97
15bbb24b3a
hex77ff4e35

2013220405 has 8 divisors (see below), whose sum is σ = 2760988032. Its totient is φ = 1380493968.

The previous prime is 2013220403. The next prime is 2013220439. The reversal of 2013220405 is 5040223102.

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

It is not a de Polignac number, because 2013220405 - 21 = 2013220403 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 (2013220403) 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, 28760257 + ... + 28760326.

It is an arithmetic number, because the mean of its divisors is an integer number (345123504).

Almost surely, 22013220405 is an apocalyptic number.

It is an amenable number.

2013220405 is a deficient number, since it is larger than the sum of its proper divisors (747767627).

2013220405 is an equidigital number, since it uses as much as digits as its factorization.

2013220405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57520595.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 2013220405 is about 44868.9247141047. The cubic root of 2013220405 is about 1262.6910664654.

Adding to 2013220405 its reverse (5040223102), we get a palindrome (7053443507).

The spelling of 2013220405 in words is "two billion, thirteen million, two hundred twenty thousand, four hundred five".

Divisors: 1 5 7 35 57520583 287602915 402644081 2013220405