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2111054287 = 23831995557
BaseRepresentation
bin111110111010100…
…0010000111001111
312110010022200001211
41331311002013033
513310412214122
6545251115251
7103212444136
oct17565020717
95403280054
102111054287
119936a9371
124aaba2b27
1327848b564
1416052691d
15c54ec877
hex7dd421cf

2111054287 has 16 divisors (see below), whose sum is σ = 2240985600. Its totient is φ = 1984558752.

The previous prime is 2111054273. The next prime is 2111054293. The reversal of 2111054287 is 7824501112.

It is a cyclic number.

It is not a de Polignac number, because 2111054287 - 223 = 2102665679 is a prime.

It is a super-2 number, since 2×21110542872 = 8913100405322156738, which 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 (2111054887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 377113 + ... + 382669.

It is an arithmetic number, because the mean of its divisors is an integer number (140061600).

Almost surely, 22111054287 is an apocalyptic number.

2111054287 is a deficient number, since it is larger than the sum of its proper divisors (129931313).

2111054287 is a wasteful number, since it uses less digits than its factorization.

2111054287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5862.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 2111054287 is about 45946.2108013272. The cubic root of 2111054287 is about 1282.8222004457.

Adding to 2111054287 its reverse (7824501112), we get a palindrome (9935555399).

The spelling of 2111054287 in words is "two billion, one hundred eleven million, fifty-four thousand, two hundred eighty-seven".

Divisors: 1 23 83 199 1909 4577 5557 16517 127811 379891 461231 1105843 10608313 25434389 91784969 2111054287