42055219 has 2 divisors, whose sum is σ = 42055220. Its totient is φ = 42055218.

The previous prime is 42055213. The next prime is 42055231. The reversal of 42055219 is 91255024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42055219 - 2¹¹ = 42053171 is a prime.

It is a super-2 number, since 2×42055219² = 3537282890275922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42055213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21027609 + 21027610.

It is an arithmetic number, because the mean of its divisors is an integer number (21027610).

Almost surely, 2^42055219 is an apocalyptic number.

42055219 is a deficient number, since it is larger than the sum of its proper divisors (1).

42055219 is an equidigital number, since it uses as much as digits as its factorization.

42055219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 42055219 is about 6484.9995373940. Note that the first 3 decimals coincide. The cubic root of 42055219 is about 347.7549332653.

The spelling of 42055219 in words is "forty-two million, fifty-five thousand, two hundred nineteen".