40318212481 has 4 divisors (see below), whose sum is σ = 41708495700. Its totient is φ = 38927929264.

The previous prime is 40318212463. The next prime is 40318212491. The reversal of 40318212481 is 18421281304.

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 9238285456 + 31079927025 = 96116^2 + 176295^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40318212481 is a prime.

It is a super-2 number, since 2×40318212481² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40318212461) 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, 695141566 + ... + 695141623.

It is an arithmetic number, because the mean of its divisors is an integer number (10427123925).

Almost surely, 2^40318212481 is an apocalyptic number.

It is an amenable number.

40318212481 is a deficient number, since it is larger than the sum of its proper divisors (1390283219).

40318212481 is a wasteful number, since it uses less digits than its factorization.

40318212481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390283218.

The product of its (nonzero) digits is 12288, while the sum is 34.

Adding to 40318212481 its reverse (18421281304), we get a palindrome (58739493785).

The spelling of 40318212481 in words is "forty billion, three hundred eighteen million, two hundred twelve thousand, four hundred eighty-one".