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42812111 = 1959181211
BaseRepresentation
bin1010001101010…
…0001011001111
32222120002011202
42203110023033
541424441421
64125340115
71026616436
oct243241317
988502152
1042812111
1122191411
121240763b
138b3c814
14598611d
153b5a10b
hex28d42cf

42812111 has 16 divisors (see below), whose sum is σ = 46300800. Its totient is φ = 39463200.

The previous prime is 42812101. The next prime is 42812167. The reversal of 42812111 is 11121824.

42812111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-42812111 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 (42812101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202796 + ... + 203006.

It is an arithmetic number, because the mean of its divisors is an integer number (2893800).

Almost surely, 242812111 is an apocalyptic number.

42812111 is a deficient number, since it is larger than the sum of its proper divisors (3488689).

42812111 is a wasteful number, since it uses less digits than its factorization.

42812111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470.

The product of its digits is 128, while the sum is 20.

The square root of 42812111 is about 6543.0964382317. The cubic root of 42812111 is about 349.8287897317.

Adding to 42812111 its reverse (11121824), we get a palindrome (53933935).

The spelling of 42812111 in words is "forty-two million, eight hundred twelve thousand, one hundred eleven".

Divisors: 1 19 59 181 211 1121 3439 4009 10679 12449 38191 202901 236531 725629 2253269 42812111