42215903 has 2 divisors, whose sum is σ = 42215904. Its totient is φ = 42215902.

The previous prime is 42215881. The next prime is 42215911. The reversal of 42215903 is 30951224.

42215903 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 is a cyclic number.

It is not a de Polignac number, because 42215903 - 2⁸ = 42215647 is a prime.

It is a super-2 number, since 2×42215903² = 3564364932210818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42215923) 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, 21107951 + 21107952.

It is an arithmetic number, because the mean of its divisors is an integer number (21107952).

Almost surely, 2^42215903 is an apocalyptic number.

42215903 is a deficient number, since it is larger than the sum of its proper divisors (1).

42215903 is an equidigital number, since it uses as much as digits as its factorization.

42215903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 42215903 is about 6497.3766244539. The cubic root of 42215903 is about 348.1972694676.

The spelling of 42215903 in words is "forty-two million, two hundred fifteen thousand, nine hundred three".