41815021 has 2 divisors, whose sum is σ = 41815022. Its totient is φ = 41815020.

The previous prime is 41815009. The next prime is 41815027. The reversal of 41815021 is 12051814.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41602500 + 212521 = 6450^2 + 461^2 .

It is a cyclic number.

It is not a de Polignac number, because 41815021 - 2²¹ = 39717869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 41814983 and 41815001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41815027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20907510 + 20907511.

It is an arithmetic number, because the mean of its divisors is an integer number (20907511).

Almost surely, 2^41815021 is an apocalyptic number.

It is an amenable number.

41815021 is a deficient number, since it is larger than the sum of its proper divisors (1).

41815021 is an equidigital number, since it uses as much as digits as its factorization.

41815021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 41815021 is about 6466.4535102326. The cubic root of 41815021 is about 347.0916024112.

Adding to 41815021 its reverse (12051814), we get a palindrome (53866835).

The spelling of 41815021 in words is "forty-one million, eight hundred fifteen thousand, twenty-one".