42231766 has 4 divisors (see below), whose sum is σ = 63347652. Its totient is φ = 21115882.

The previous prime is 42231733. The next prime is 42231767. The reversal of 42231766 is 66713224.

42231766 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42231767) 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 as a sum of consecutive naturals, namely, 10557940 + ... + 10557943.

It is an arithmetic number, because the mean of its divisors is an integer number (15836913).

Almost surely, 2^42231766 is an apocalyptic number.

42231766 is a deficient number, since it is larger than the sum of its proper divisors (21115886).

42231766 is a wasteful number, since it uses less digits than its factorization.

42231766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21115885.

The product of its digits is 12096, while the sum is 31.

The square root of 42231766 is about 6498.5972332496. The cubic root of 42231766 is about 348.2408767436.

It can be divided in two parts, 42231 and 766, that multiplied together give a triangular number (32348946 = T₈₀₄₃).

The spelling of 42231766 in words is "forty-two million, two hundred thirty-one thousand, seven hundred sixty-six".