42215339 has 2 divisors, whose sum is σ = 42215340. Its totient is φ = 42215338.

The previous prime is 42215323. The next prime is 42215351. The reversal of 42215339 is 93351224.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42215339 - 2⁴ = 42215323 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42215939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21107669 + 21107670.

It is an arithmetic number, because the mean of its divisors is an integer number (21107670).

Almost surely, 2^42215339 is an apocalyptic number.

42215339 is a deficient number, since it is larger than the sum of its proper divisors (1).

42215339 is an equidigital number, since it uses as much as digits as its factorization.

42215339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 29.

The square root of 42215339 is about 6497.3332221766. Note that the first 3 decimals coincide. The cubic root of 42215339 is about 348.1957188345.

The spelling of 42215339 in words is "forty-two million, two hundred fifteen thousand, three hundred thirty-nine".