40254223081 has 2 divisors, whose sum is σ = 40254223082. Its totient is φ = 40254223080.

The previous prime is 40254223073. The next prime is 40254223123. The reversal of 40254223081 is 18032245204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33602189481 + 6652033600 = 183309^2 + 81560^2 .

It is a cyclic number.

It is not a de Polignac number, because 40254223081 - 2³ = 40254223073 is a prime.

It is a super-2 number, since 2×40254223081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40254223181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20127111540 + 20127111541.

It is an arithmetic number, because the mean of its divisors is an integer number (20127111541).

Almost surely, 2^40254223081 is an apocalyptic number.

It is an amenable number.

40254223081 is a deficient number, since it is larger than the sum of its proper divisors (1).

40254223081 is an equidigital number, since it uses as much as digits as its factorization.

40254223081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 31.

Adding to 40254223081 its reverse (18032245204), we get a palindrome (58286468285).

The spelling of 40254223081 in words is "forty billion, two hundred fifty-four million, two hundred twenty-three thousand, eighty-one".