42235931 has 4 divisors (see below), whose sum is σ = 42363864. Its totient is φ = 42108000.

The previous prime is 42235903. The next prime is 42235937. The reversal of 42235931 is 13953224.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42235931 is a prime.

It is a super-2 number, since 2×42235931² = 3567747734873522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42235894 and 42235903.

It is not an unprimeable number, because it can be changed into a prime (42235937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63470 + ... + 64131.

It is an arithmetic number, because the mean of its divisors is an integer number (10590966).

Almost surely, 2^42235931 is an apocalyptic number.

42235931 is a deficient number, since it is larger than the sum of its proper divisors (127933).

42235931 is a wasteful number, since it uses less digits than its factorization.

42235931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127932.

The product of its digits is 6480, while the sum is 29.

The square root of 42235931 is about 6498.9176791217. The cubic root of 42235931 is about 348.2523244894.

The spelling of 42235931 in words is "forty-two million, two hundred thirty-five thousand, nine hundred thirty-one".