40155197 has 2 divisors, whose sum is σ = 40155198. Its totient is φ = 40155196.

The previous prime is 40155133. The next prime is 40155209. The reversal of 40155197 is 79155104.

40155197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30980356 + 9174841 = 5566^2 + 3029^2 .

It is a cyclic number.

It is not a de Polignac number, because 40155197 - 2⁶ = 40155133 is a prime.

It is a super-2 number, since 2×40155197² = 3224879692217618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40155127) 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, 20077598 + 20077599.

It is an arithmetic number, because the mean of its divisors is an integer number (20077599).

Almost surely, 2^40155197 is an apocalyptic number.

It is an amenable number.

40155197 is a deficient number, since it is larger than the sum of its proper divisors (1).

40155197 is an equidigital number, since it uses as much as digits as its factorization.

40155197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 40155197 is about 6336.8128424311. The cubic root of 40155197 is about 342.4369237565.

The spelling of 40155197 in words is "forty million, one hundred fifty-five thousand, one hundred ninety-seven".