40161019 has 2 divisors, whose sum is σ = 40161020. Its totient is φ = 40161018.

The previous prime is 40160999. The next prime is 40161031. The reversal of 40161019 is 91016104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40161019 - 2⁷ = 40160891 is a prime.

It is a super-2 number, since 2×40161019² = 3225814894236722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40161049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20080509 + 20080510.

It is an arithmetic number, because the mean of its divisors is an integer number (20080510).

Almost surely, 2^40161019 is an apocalyptic number.

40161019 is a deficient number, since it is larger than the sum of its proper divisors (1).

40161019 is an equidigital number, since it uses as much as digits as its factorization.

40161019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 40161019 is about 6337.2722049790. The cubic root of 40161019 is about 342.4534726433.

The spelling of 40161019 in words is "forty million, one hundred sixty-one thousand, nineteen".