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2005251215 = 51136459113
BaseRepresentation
bin111011110000101…
…1011010010001111
312011202020022112112
41313201123102033
513101321014330
6530551254235
7100456232312
oct16741332217
95152208475
102005251215
11939a03a10
1247b67a37b
1325c5955a6
14150464979
15bb09d795
hex7785b48f

2005251215 has 8 divisors (see below), whose sum is σ = 2625056208. Its totient is φ = 1458364480.

The previous prime is 2005251211. The next prime is 2005251217. The reversal of 2005251215 is 5121525002.

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

It is not a de Polignac number, because 2005251215 - 22 = 2005251211 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 (2005251211) 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, 18229502 + ... + 18229611.

It is an arithmetic number, because the mean of its divisors is an integer number (328132026).

Almost surely, 22005251215 is an apocalyptic number.

2005251215 is a deficient number, since it is larger than the sum of its proper divisors (619804993).

2005251215 is a wasteful number, since it uses less digits than its factorization.

2005251215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36459129.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 2005251215 is about 44780.0314314316. The cubic root of 2005251215 is about 1261.0227722792.

Adding to 2005251215 its reverse (5121525002), we get a palindrome (7126776217).

The spelling of 2005251215 in words is "two billion, five million, two hundred fifty-one thousand, two hundred fifteen".

Divisors: 1 5 11 55 36459113 182295565 401050243 2005251215