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41981561 = 57117351
BaseRepresentation
bin1010000000100…
…1011001111001
32220222212212122
42200021121321
541221402221
64055451025
71016560136
oct240113171
986885778
1041981561
1121774406
1212086a75
13890b77b
14580b58d
153a43eab
hex2809679

41981561 has 4 divisors (see below), whose sum is σ = 41994624. Its totient is φ = 41968500.

The previous prime is 41981549. The next prime is 41981573. The reversal of 41981561 is 16518914.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (41981549) and next prime (41981573).

It is a cyclic number.

It is not a de Polignac number, because 41981561 - 210 = 41980537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (41981591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2036 + ... + 9386.

It is an arithmetic number, because the mean of its divisors is an integer number (10498656).

Almost surely, 241981561 is an apocalyptic number.

It is an amenable number.

41981561 is a deficient number, since it is larger than the sum of its proper divisors (13063).

41981561 is an equidigital number, since it uses as much as digits as its factorization.

41981561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13062.

The product of its digits is 8640, while the sum is 35.

The square root of 41981561 is about 6479.3179424998. The cubic root of 41981561 is about 347.5517884273.

The spelling of 41981561 in words is "forty-one million, nine hundred eighty-one thousand, five hundred sixty-one".

Divisors: 1 5711 7351 41981561