42055511 has 2 divisors, whose sum is σ = 42055512. Its totient is φ = 42055510.

The previous prime is 42055487. The next prime is 42055543. The reversal of 42055511 is 11555024.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42055511 - 2¹⁰ = 42054487 is a prime.

It is a super-2 number, since 2×42055511² = 3537332010942242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42055411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21027755 + 21027756.

It is an arithmetic number, because the mean of its divisors is an integer number (21027756).

Almost surely, 2^42055511 is an apocalyptic number.

42055511 is a deficient number, since it is larger than the sum of its proper divisors (1).

42055511 is an equidigital number, since it uses as much as digits as its factorization.

42055511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 42055511 is about 6485.0220508492. The cubic root of 42055511 is about 347.7557381135.

The spelling of 42055511 in words is "forty-two million, fifty-five thousand, five hundred eleven".