42331901 has 2 divisors, whose sum is σ = 42331902. Its totient is φ = 42331900.

The previous prime is 42331879. The next prime is 42331907. The reversal of 42331901 is 10913324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42055225 + 276676 = 6485^2 + 526^2 .

It is a cyclic number.

It is not a de Polignac number, because 42331901 - 2⁶ = 42331837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42331907) 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, 21165950 + 21165951.

It is an arithmetic number, because the mean of its divisors is an integer number (21165951).

Almost surely, 2^42331901 is an apocalyptic number.

It is an amenable number.

42331901 is a deficient number, since it is larger than the sum of its proper divisors (1).

42331901 is an equidigital number, since it uses as much as digits as its factorization.

42331901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 42331901 is about 6506.2970267273. The cubic root of 42331901 is about 348.5158954399.

The spelling of 42331901 in words is "forty-two million, three hundred thirty-one thousand, nine hundred one".