40130040521 has 2 divisors, whose sum is σ = 40130040522. Its totient is φ = 40130040520.

The previous prime is 40130040479. The next prime is 40130040541. The reversal of 40130040521 is 12504003104.

It is an a-pointer prime, because the next prime (40130040541) can be obtained adding 40130040521 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38763703225 + 1366337296 = 196885^2 + 36964^2 .

It is a cyclic number.

It is not a de Polignac number, because 40130040521 - 2¹⁰ = 40130039497 is a prime.

It is a super-2 number, since 2×40130040521² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40130040493 and 40130040502.

It is not a weakly prime, because it can be changed into another prime (40130040541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20065020260 + 20065020261.

It is an arithmetic number, because the mean of its divisors is an integer number (20065020261).

Almost surely, 2^40130040521 is an apocalyptic number.

It is an amenable number.

40130040521 is a deficient number, since it is larger than the sum of its proper divisors (1).

40130040521 is an equidigital number, since it uses as much as digits as its factorization.

40130040521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 40130040521 its reverse (12504003104), we get a palindrome (52634043625).

The spelling of 40130040521 in words is "forty billion, one hundred thirty million, forty thousand, five hundred twenty-one".