40140410521 has 2 divisors, whose sum is σ = 40140410522. Its totient is φ = 40140410520.

The previous prime is 40140410467. The next prime is 40140410551. The reversal of 40140410521 is 12501404104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22302136921 + 17838273600 = 149339^2 + 133560^2 .

It is a cyclic number.

It is not a de Polignac number, because 40140410521 - 2²³ = 40132021913 is a prime.

It is a super-2 number, since 2×40140410521² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40140410492 and 40140410501.

It is not a weakly prime, because it can be changed into another prime (40140410551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20070205260 + 20070205261.

It is an arithmetic number, because the mean of its divisors is an integer number (20070205261).

Almost surely, 2^40140410521 is an apocalyptic number.

It is an amenable number.

40140410521 is a deficient number, since it is larger than the sum of its proper divisors (1).

40140410521 is an equidigital number, since it uses as much as digits as its factorization.

40140410521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 40140410521 its reverse (12501404104), we get a palindrome (52641814625).

The spelling of 40140410521 in words is "forty billion, one hundred forty million, four hundred ten thousand, five hundred twenty-one".