40043222491 has 2 divisors, whose sum is σ = 40043222492. Its totient is φ = 40043222490.

The previous prime is 40043222459. The next prime is 40043222563. The reversal of 40043222491 is 19422234004.

40043222491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40043222491 - 2⁵ = 40043222459 is a prime.

It is not a weakly prime, because it can be changed into another prime (40043222431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20021611245 + 20021611246.

It is an arithmetic number, because the mean of its divisors is an integer number (20021611246).

Almost surely, 2^40043222491 is an apocalyptic number.

40043222491 is a deficient number, since it is larger than the sum of its proper divisors (1).

40043222491 is an equidigital number, since it uses as much as digits as its factorization.

40043222491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 40043222491 its reverse (19422234004), we get a palindrome (59465456495).

The spelling of 40043222491 in words is "forty billion, forty-three million, two hundred twenty-two thousand, four hundred ninety-one".