36131021 has 2 divisors, whose sum is σ = 36131022. Its totient is φ = 36131020.

The previous prime is 36131009. The next prime is 36131057. The reversal of 36131021 is 12013163.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34975396 + 1155625 = 5914^2 + 1075^2 .

It is a cyclic number.

It is not a de Polignac number, because 36131021 - 2⁶ = 36130957 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36121021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18065510 + 18065511.

It is an arithmetic number, because the mean of its divisors is an integer number (18065511).

Almost surely, 2^36131021 is an apocalyptic number.

It is an amenable number.

36131021 is a deficient number, since it is larger than the sum of its proper divisors (1).

36131021 is an equidigital number, since it uses as much as digits as its factorization.

36131021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 36131021 is about 6010.9085003849. The cubic root of 36131021 is about 330.5928156583.

Adding to 36131021 its reverse (12013163), we get a palindrome (48144184).

The spelling of 36131021 in words is "thirty-six million, one hundred thirty-one thousand, twenty-one".