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199801205519 = 1519913145681
BaseRepresentation
bin1011101000010100010…
…1000111001100001111
3201002201111012212201212
42322011011013030033
511233143102034034
6231442025125035
720302155140156
oct2720505071417
9632644185655
10199801205519
117780a631a43
123288102977b
1315ac20977c6
14995593459d
1552e5ca72ce
hex2e8514730f

199801205519 has 4 divisors (see below), whose sum is σ = 199814366400. Its totient is φ = 199788044640.

The previous prime is 199801205477. The next prime is 199801205579. The reversal of 199801205519 is 915502108991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-199801205519 is a prime.

It is a super-2 number, since 2×1998012055192 (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199801205579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6557642 + ... + 6588039.

It is an arithmetic number, because the mean of its divisors is an integer number (49953591600).

Almost surely, 2199801205519 is an apocalyptic number.

199801205519 is a deficient number, since it is larger than the sum of its proper divisors (13160881).

199801205519 is a wasteful number, since it uses less digits than its factorization.

199801205519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13160880.

The product of its (nonzero) digits is 291600, while the sum is 50.

The spelling of 199801205519 in words is "one hundred ninety-nine billion, eight hundred one million, two hundred five thousand, five hundred nineteen".

Divisors: 1 15199 13145681 199801205519