42019511 has 2 divisors, whose sum is σ = 42019512. Its totient is φ = 42019510.

The previous prime is 42019501. The next prime is 42019517. The reversal of 42019511 is 11591024.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42019511 - 2¹⁴ = 42003127 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42019517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21009755 + 21009756.

It is an arithmetic number, because the mean of its divisors is an integer number (21009756).

Almost surely, 2^42019511 is an apocalyptic number.

42019511 is a deficient number, since it is larger than the sum of its proper divisors (1).

42019511 is an equidigital number, since it uses as much as digits as its factorization.

42019511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 42019511 is about 6482.2458299574. The cubic root of 42019511 is about 347.6564821526.

The spelling of 42019511 in words is "forty-two million, nineteen thousand, five hundred eleven".