36511421 has 2 divisors, whose sum is σ = 36511422. Its totient is φ = 36511420.

The previous prime is 36511411. The next prime is 36511441. The reversal of 36511421 is 12411563.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26988025 + 9523396 = 5195^2 + 3086^2 .

It is a cyclic number.

It is not a de Polignac number, because 36511421 - 2¹⁸ = 36249277 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36511411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18255710 + 18255711.

It is an arithmetic number, because the mean of its divisors is an integer number (18255711).

Almost surely, 2^36511421 is an apocalyptic number.

It is an amenable number.

36511421 is a deficient number, since it is larger than the sum of its proper divisors (1).

36511421 is an equidigital number, since it uses as much as digits as its factorization.

36511421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 23.

The square root of 36511421 is about 6042.4681215543. The cubic root of 36511421 is about 331.7489664987.

Adding to 36511421 its reverse (12411563), we get a palindrome (48922984).

The spelling of 36511421 in words is "thirty-six million, five hundred eleven thousand, four hundred twenty-one".