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1228087201 = 11210149481
BaseRepresentation
bin100100100110011…
…0001111110100001
310011120212021221011
41021030301332201
510003342242301
6321510100521
742301366105
oct11114617641
93146767834
101228087201
11580250100
122a334a741
13167579923
14b9161905
1572c37a51
hex49331fa1

1228087201 has 6 divisors (see below), whose sum is σ = 1349881106. Its totient is φ = 1116442800.

The previous prime is 1228087199. The next prime is 1228087219. The reversal of 1228087201 is 1027808221.

It can be written as a sum of positive squares in only one way, i.e., 882090000 + 345997201 = 29700^2 + 18601^2 .

It is not a de Polignac number, because 1228087201 - 21 = 1228087199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1228087241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5074620 + ... + 5074861.

Almost surely, 21228087201 is an apocalyptic number.

1228087201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1228087201 is a deficient number, since it is larger than the sum of its proper divisors (121793905).

1228087201 is a wasteful number, since it uses less digits than its factorization.

1228087201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10149503 (or 10149492 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 1228087201 is about 35044.0751197688. The cubic root of 1228087201 is about 1070.8855745444.

The spelling of 1228087201 in words is "one billion, two hundred twenty-eight million, eighty-seven thousand, two hundred one".

Divisors: 1 11 121 10149481 111644291 1228087201