40220000393 has 2 divisors, whose sum is σ = 40220000394. Its totient is φ = 40220000392.

The previous prime is 40220000321. The next prime is 40220000537. The reversal of 40220000393 is 39300002204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34385026624 + 5834973769 = 185432^2 + 76387^2 .

It is a cyclic number.

It is not a de Polignac number, because 40220000393 - 2¹⁸ = 40219738249 is a prime.

It is a super-2 number, since 2×40220000393² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40220000993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20110000196 + 20110000197.

It is an arithmetic number, because the mean of its divisors is an integer number (20110000197).

Almost surely, 2^40220000393 is an apocalyptic number.

It is an amenable number.

40220000393 is a deficient number, since it is larger than the sum of its proper divisors (1).

40220000393 is an equidigital number, since it uses as much as digits as its factorization.

40220000393 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 23.

Adding to 40220000393 its reverse (39300002204), we get a palindrome (79520002597).

The spelling of 40220000393 in words is "forty billion, two hundred twenty million, three hundred ninety-three", and thus it is an aban number.