42611931 has 12 divisors (see below), whose sum is σ = 61607208. Its totient is φ = 28381824.

The previous prime is 42611923. The next prime is 42611941. The reversal of 42611931 is 13911624.

42611931 is a `hidden beast` number, since 42 + 611 + 9 + 3 + 1 = 666.

42611931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42611931 - 2³ = 42611923 is a prime.

It is a super-2 number, since 2×42611931² = 3631553327097522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42611895 and 42611904.

It is not an unprimeable number, because it can be changed into a prime (42611941) 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 11 ways as a sum of consecutive naturals, for example, 17611 + ... + 19883.

It is an arithmetic number, because the mean of its divisors is an integer number (5133934).

Almost surely, 2^42611931 is an apocalyptic number.

42611931 is a deficient number, since it is larger than the sum of its proper divisors (18995277).

42611931 is a wasteful number, since it uses less digits than its factorization.

42611931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4362 (or 4359 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 42611931 is about 6527.7814761219. The cubic root of 42611931 is about 349.2826969229.

The spelling of 42611931 in words is "forty-two million, six hundred eleven thousand, nine hundred thirty-one".