40531901 has 2 divisors, whose sum is σ = 40531902. Its totient is φ = 40531900.

The previous prime is 40531891. The next prime is 40531913. The reversal of 40531901 is 10913504.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28622500 + 11909401 = 5350^2 + 3451^2 .

It is a cyclic number.

It is not a de Polignac number, because 40531901 - 2⁶ = 40531837 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40531801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20265950 + 20265951.

It is an arithmetic number, because the mean of its divisors is an integer number (20265951).

Almost surely, 2^40531901 is an apocalyptic number.

It is an amenable number.

40531901 is a deficient number, since it is larger than the sum of its proper divisors (1).

40531901 is an equidigital number, since it uses as much as digits as its factorization.

40531901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 40531901 is about 6366.4669165873. The cubic root of 40531901 is about 343.5044158406.

The spelling of 40531901 in words is "forty million, five hundred thirty-one thousand, nine hundred one".