40782481 has 2 divisors, whose sum is σ = 40782482. Its totient is φ = 40782480.

The previous prime is 40782451. The next prime is 40782503. The reversal of 40782481 is 18428704.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35760400 + 5022081 = 5980^2 + 2241^2 .

It is a cyclic number.

It is not a de Polignac number, because 40782481 - 2¹³ = 40774289 is a prime.

It is a super-2 number, since 2×40782481² = 3326421513030722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40782421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20391240 + 20391241.

It is an arithmetic number, because the mean of its divisors is an integer number (20391241).

Almost surely, 2^40782481 is an apocalyptic number.

It is an amenable number.

40782481 is a deficient number, since it is larger than the sum of its proper divisors (1).

40782481 is an equidigital number, since it uses as much as digits as its factorization.

40782481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14336, while the sum is 34.

The square root of 40782481 is about 6386.1162689071. The cubic root of 40782481 is about 344.2108434545.

The spelling of 40782481 in words is "forty million, seven hundred eighty-two thousand, four hundred eighty-one".