40023201391 has 2 divisors, whose sum is σ = 40023201392. Its totient is φ = 40023201390.

The previous prime is 40023201367. The next prime is 40023201457. The reversal of 40023201391 is 19310232004.

40023201391 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 40023201391 - 2⁵ = 40023201359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40023201091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20011600695 + 20011600696.

It is an arithmetic number, because the mean of its divisors is an integer number (20011600696).

Almost surely, 2^40023201391 is an apocalyptic number.

40023201391 is a deficient number, since it is larger than the sum of its proper divisors (1).

40023201391 is an equidigital number, since it uses as much as digits as its factorization.

40023201391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 40023201391 its reverse (19310232004), we get a palindrome (59333433395).

The spelling of 40023201391 in words is "forty billion, twenty-three million, two hundred one thousand, three hundred ninety-one".