40022320381 has 2 divisors, whose sum is σ = 40022320382. Its totient is φ = 40022320380.

The previous prime is 40022320343. The next prime is 40022320427. The reversal of 40022320381 is 18302322004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35244054756 + 4778265625 = 187734^2 + 69125^2 .

It is a cyclic number.

It is not a de Polignac number, because 40022320381 - 2¹⁷ = 40022189309 is a prime.

It is a super-2 number, since 2×40022320381² (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 (40022320181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20011160190 + 20011160191.

It is an arithmetic number, because the mean of its divisors is an integer number (20011160191).

Almost surely, 2^40022320381 is an apocalyptic number.

It is an amenable number.

40022320381 is a deficient number, since it is larger than the sum of its proper divisors (1).

40022320381 is an equidigital number, since it uses as much as digits as its factorization.

40022320381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 40022320381 its reverse (18302322004), we get a palindrome (58324642385).

The spelling of 40022320381 in words is "forty billion, twenty-two million, three hundred twenty thousand, three hundred eighty-one".