40243203261 has 12 divisors (see below), whose sum is σ = 58925360988. Its totient is φ = 26461283904.

The previous prime is 40243203241. The next prime is 40243203271. The reversal of 40243203261 is 16230234204.

It can be written as a sum of positive squares in 2 ways, for example, as 29110843161 + 11132360100 = 170619^2 + 105510^2 .

It is not a de Polignac number, because 40243203261 - 2⁵ = 40243203229 is a prime.

It is a super-3 number, since 3×40243203261³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40243203241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30625830 + ... + 30627143.

It is an arithmetic number, because the mean of its divisors is an integer number (4910446749).

Almost surely, 2^40243203261 is an apocalyptic number.

It is an amenable number.

40243203261 is a deficient number, since it is larger than the sum of its proper divisors (18682157727).

40243203261 is a wasteful number, since it uses less digits than its factorization.

40243203261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61253052 (or 61253049 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 40243203261 its reverse (16230234204), we get a palindrome (56473437465).

The spelling of 40243203261 in words is "forty billion, two hundred forty-three million, two hundred three thousand, two hundred sixty-one".