42219013 has 2 divisors, whose sum is σ = 42219014. Its totient is φ = 42219012.

The previous prime is 42218999. The next prime is 42219017. The reversal of 42219013 is 31091224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24930049 + 17288964 = 4993^2 + 4158^2 .

It is a cyclic number.

It is not a de Polignac number, because 42219013 - 2²⁵ = 8664581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42219017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21109506 + 21109507.

It is an arithmetic number, because the mean of its divisors is an integer number (21109507).

Almost surely, 2^42219013 is an apocalyptic number.

It is an amenable number.

42219013 is a deficient number, since it is larger than the sum of its proper divisors (1).

42219013 is an equidigital number, since it uses as much as digits as its factorization.

42219013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 42219013 is about 6497.6159474072. The cubic root of 42219013 is about 348.2058196966.

The spelling of 42219013 in words is "forty-two million, two hundred nineteen thousand, thirteen".