40188541 has 2 divisors, whose sum is σ = 40188542. Its totient is φ = 40188540.

The previous prime is 40188523. The next prime is 40188559. The reversal of 40188541 is 14588104.

It is a balanced prime because it is at equal distance from previous prime (40188523) and next prime (40188559).

It can be written as a sum of positive squares in only one way, i.e., 38875225 + 1313316 = 6235^2 + 1146^2 .

It is a cyclic number.

It is not a de Polignac number, because 40188541 - 2⁵ = 40188509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40188571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20094270 + 20094271.

It is an arithmetic number, because the mean of its divisors is an integer number (20094271).

Almost surely, 2^40188541 is an apocalyptic number.

It is an amenable number.

40188541 is a deficient number, since it is larger than the sum of its proper divisors (1).

40188541 is an equidigital number, since it uses as much as digits as its factorization.

40188541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 40188541 is about 6339.4432720863. The cubic root of 40188541 is about 342.5316815846.

The spelling of 40188541 in words is "forty million, one hundred eighty-eight thousand, five hundred forty-one".