40312021331 has 2 divisors, whose sum is σ = 40312021332. Its totient is φ = 40312021330.

The previous prime is 40312021303. The next prime is 40312021411. The reversal of 40312021331 is 13312021304.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40312021331 - 2¹⁴ = 40312004947 is a prime.

It is a super-2 number, since 2×40312021331² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40312023331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20156010665 + 20156010666.

It is an arithmetic number, because the mean of its divisors is an integer number (20156010666).

Almost surely, 2^40312021331 is an apocalyptic number.

40312021331 is a deficient number, since it is larger than the sum of its proper divisors (1).

40312021331 is an equidigital number, since it uses as much as digits as its factorization.

40312021331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 40312021331 its reverse (13312021304), we get a palindrome (53624042635).

The spelling of 40312021331 in words is "forty billion, three hundred twelve million, twenty-one thousand, three hundred thirty-one".