41951681 has 4 divisors (see below), whose sum is σ = 42020292. Its totient is φ = 41883072.

The previous prime is 41951671. The next prime is 41951731. The reversal of 41951681 is 18615914.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13808656 + 28143025 = 3716^2 + 5305^2 .

It is a cyclic number.

It is not a de Polignac number, because 41951681 - 2¹⁸ = 41689537 is a prime.

It is a super-2 number, since 2×41951681² = 3519887077451522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (41951621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33380 + ... + 34613.

It is an arithmetic number, because the mean of its divisors is an integer number (10505073).

Almost surely, 2^41951681 is an apocalyptic number.

It is an amenable number.

41951681 is a deficient number, since it is larger than the sum of its proper divisors (68611).

41951681 is an equidigital number, since it uses as much as digits as its factorization.

41951681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68610.

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

The square root of 41951681 is about 6477.0117338168. The cubic root of 41951681 is about 347.4693132331.

The spelling of 41951681 in words is "forty-one million, nine hundred fifty-one thousand, six hundred eighty-one".