42005511 has 12 divisors (see below), whose sum is σ = 60732360. Its totient is φ = 27977040.

The previous prime is 42005503. The next prime is 42005519. The reversal of 42005511 is 11550024.

It is an interprime number because it is at equal distance from previous prime (42005503) and next prime (42005519).

It is not a de Polignac number, because 42005511 - 2³ = 42005503 is a prime.

It is a super-2 number, since 2×42005511² = 3528925908742242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42005519) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14016 + ... + 16746.

It is an arithmetic number, because the mean of its divisors is an integer number (5061030).

Almost surely, 2^42005511 is an apocalyptic number.

42005511 is a deficient number, since it is larger than the sum of its proper divisors (18726849).

42005511 is a wasteful number, since it uses less digits than its factorization.

42005511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4446 (or 4443 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 42005511 is about 6481.1658673421. The cubic root of 42005511 is about 347.6178673022.

Adding to 42005511 its reverse (11550024), we get a palindrome (53555535).

The spelling of 42005511 in words is "forty-two million, five thousand, five hundred eleven".