40198111 has 2 divisors, whose sum is σ = 40198112. Its totient is φ = 40198110.

The previous prime is 40198097. The next prime is 40198117. The reversal of 40198111 is 11189104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40198111 - 2¹⁷ = 40067039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40198117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20099055 + 20099056.

It is an arithmetic number, because the mean of its divisors is an integer number (20099056).

Almost surely, 2^40198111 is an apocalyptic number.

40198111 is a deficient number, since it is larger than the sum of its proper divisors (1).

40198111 is an equidigital number, since it uses as much as digits as its factorization.

40198111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 25.

The square root of 40198111 is about 6340.1980252986. The cubic root of 40198111 is about 342.5588681735.

The spelling of 40198111 in words is "forty million, one hundred ninety-eight thousand, one hundred eleven".