40545019 has 2 divisors, whose sum is σ = 40545020. Its totient is φ = 40545018.

The previous prime is 40544989. The next prime is 40545061. The reversal of 40545019 is 91054504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40545019 - 2¹⁹ = 40020731 is a prime.

It is a super-2 number, since 2×40545019² = 3287797131420722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40545719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20272509 + 20272510.

It is an arithmetic number, because the mean of its divisors is an integer number (20272510).

Almost surely, 2^40545019 is an apocalyptic number.

40545019 is a deficient number, since it is larger than the sum of its proper divisors (1).

40545019 is an equidigital number, since it uses as much as digits as its factorization.

40545019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 40545019 is about 6367.4970749895. The cubic root of 40545019 is about 343.5414698218.

The spelling of 40545019 in words is "forty million, five hundred forty-five thousand, nineteen".