40731641 has 4 divisors (see below), whose sum is σ = 41092212. Its totient is φ = 40371072.

The previous prime is 40731637. The next prime is 40731671. The reversal of 40731641 is 14613704.

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 1092025 + 39639616 = 1045^2 + 6296^2 .

It is a cyclic number.

It is not a de Polignac number, because 40731641 - 2² = 40731637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40731641.

It is not an unprimeable number, because it can be changed into a prime (40731671) 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, 180116 + ... + 180341.

It is an arithmetic number, because the mean of its divisors is an integer number (10273053).

Almost surely, 2^40731641 is an apocalyptic number.

It is an amenable number.

40731641 is a deficient number, since it is larger than the sum of its proper divisors (360571).

40731641 is a wasteful number, since it uses less digits than its factorization.

40731641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360570.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 40731641 is about 6382.1345175419. The cubic root of 40731641 is about 344.0677513255.

The spelling of 40731641 in words is "forty million, seven hundred thirty-one thousand, six hundred forty-one".