40131542221 has 2 divisors, whose sum is σ = 40131542222. Its totient is φ = 40131542220.

The previous prime is 40131542173. The next prime is 40131542233. The reversal of 40131542221 is 12224513104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37570068900 + 2561473321 = 193830^2 + 50611^2 .

It is a cyclic number.

It is not a de Polignac number, because 40131542221 - 2⁷ = 40131542093 is a prime.

It is a super-2 number, since 2×40131542221² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40131542251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20065771110 + 20065771111.

It is an arithmetic number, because the mean of its divisors is an integer number (20065771111).

Almost surely, 2^40131542221 is an apocalyptic number.

It is an amenable number.

40131542221 is a deficient number, since it is larger than the sum of its proper divisors (1).

40131542221 is an equidigital number, since it uses as much as digits as its factorization.

40131542221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 25.

The spelling of 40131542221 in words is "forty billion, one hundred thirty-one million, five hundred forty-two thousand, two hundred twenty-one".