40250981 has 2 divisors, whose sum is σ = 40250982. Its totient is φ = 40250980.

The previous prime is 40250963. The next prime is 40251007. The reversal of 40250981 is 18905204.

40250981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38316100 + 1934881 = 6190^2 + 1391^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40250981 is a prime.

It is a super-2 number, since 2×40250981² = 3240282942924722, which contains 22 as substring.

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 (40250081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20125490 + 20125491.

It is an arithmetic number, because the mean of its divisors is an integer number (20125491).

Almost surely, 2^40250981 is an apocalyptic number.

It is an amenable number.

40250981 is a deficient number, since it is larger than the sum of its proper divisors (1).

40250981 is an equidigital number, since it uses as much as digits as its factorization.

40250981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 40250981 is about 6344.3660833845. The cubic root of 40250981 is about 342.7089842908.

The spelling of 40250981 in words is "forty million, two hundred fifty thousand, nine hundred eighty-one".