42511331 has 8 divisors (see below), whose sum is σ = 43298880. Its totient is φ = 41729472.

The previous prime is 42511309. The next prime is 42511333. The reversal of 42511331 is 13311524.

42511331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42511331 - 2⁶ = 42511267 is a prime.

It is a super-2 number, since 2×42511331² = 3614426526783122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42511333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15446 + ... + 17988.

It is an arithmetic number, because the mean of its divisors is an integer number (5412360).

Almost surely, 2^42511331 is an apocalyptic number.

42511331 is a deficient number, since it is larger than the sum of its proper divisors (787549).

42511331 is a wasteful number, since it uses less digits than its factorization.

42511331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2845.

The product of its digits is 360, while the sum is 20.

The square root of 42511331 is about 6520.0713953146. The cubic root of 42511331 is about 349.0076133456.

Adding to 42511331 its reverse (13311524), we get a palindrome (55822855).

The spelling of 42511331 in words is "forty-two million, five hundred eleven thousand, three hundred thirty-one".