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1214521999 = 3179749157
BaseRepresentation
bin100100001100100…
…0010001010001111
310010122100002222021
41020121002022033
54441404200444
6320303231011
742045160315
oct11031021217
93118302867
101214521999
11573625399
1229a8a8467
1316480a392
14b74300b5
1571958584
hex4864228f

1214521999 has 8 divisors (see below), whose sum is σ = 1255298688. Its totient is φ = 1173845280.

The previous prime is 1214521993. The next prime is 1214522027. The reversal of 1214521999 is 9991254121.

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 1214521999 - 211 = 1214519951 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 (1214521993) 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, 129 + ... + 49285.

It is an arithmetic number, because the mean of its divisors is an integer number (156912336).

Almost surely, 21214521999 is an apocalyptic number.

1214521999 is a deficient number, since it is larger than the sum of its proper divisors (40776689).

1214521999 is an equidigital number, since it uses as much as digits as its factorization.

1214521999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49985.

The product of its digits is 58320, while the sum is 43.

The square root of 1214521999 is about 34849.9928120509. The cubic root of 1214521999 is about 1066.9280389547.

The spelling of 1214521999 in words is "one billion, two hundred fourteen million, five hundred twenty-one thousand, nine hundred ninety-nine".

Divisors: 1 31 797 24707 49157 1523867 39178129 1214521999