40212352591 has 2 divisors, whose sum is σ = 40212352592. Its totient is φ = 40212352590.

The previous prime is 40212352541. The next prime is 40212352601. The reversal of 40212352591 is 19525321204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40212352591 - 2¹³ = 40212344399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40212352501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20106176295 + 20106176296.

It is an arithmetic number, because the mean of its divisors is an integer number (20106176296).

Almost surely, 2^40212352591 is an apocalyptic number.

40212352591 is a deficient number, since it is larger than the sum of its proper divisors (1).

40212352591 is an equidigital number, since it uses as much as digits as its factorization.

40212352591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 34.

Adding to 40212352591 its reverse (19525321204), we get a palindrome (59737673795).

The spelling of 40212352591 in words is "forty billion, two hundred twelve million, three hundred fifty-two thousand, five hundred ninety-one".