40043144293 has 2 divisors, whose sum is σ = 40043144294. Its totient is φ = 40043144292.

The previous prime is 40043144263. The next prime is 40043144303. The reversal of 40043144293 is 39244134004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28374391809 + 11668752484 = 168447^2 + 108022^2 .

It is a cyclic number.

It is not a de Polignac number, because 40043144293 - 2¹⁷ = 40043013221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40043144203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20021572146 + 20021572147.

It is an arithmetic number, because the mean of its divisors is an integer number (20021572147).

Almost surely, 2^40043144293 is an apocalyptic number.

It is an amenable number.

40043144293 is a deficient number, since it is larger than the sum of its proper divisors (1).

40043144293 is an equidigital number, since it uses as much as digits as its factorization.

40043144293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 34.

Adding to 40043144293 its reverse (39244134004), we get a palindrome (79287278297).

The spelling of 40043144293 in words is "forty billion, forty-three million, one hundred forty-four thousand, two hundred ninety-three".