42331906 has 8 divisors (see below), whose sum is σ = 63771084. Its totient is φ = 21074880.

The previous prime is 42331901. The next prime is 42331907. The reversal of 42331906 is 60913324.

It can be written as a sum of positive squares in 2 ways, for example, as 41538025 + 793881 = 6445^2 + 891^2 .

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

It is not an unprimeable number, because it can be changed into a prime (42331901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44955 + ... + 45886.

Almost surely, 2^42331906 is an apocalyptic number.

42331906 is a deficient number, since it is larger than the sum of its proper divisors (21439178).

42331906 is a wasteful number, since it uses less digits than its factorization.

42331906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91076.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 42331906 is about 6506.2974109704. The cubic root of 42331906 is about 348.5159091615.

The spelling of 42331906 in words is "forty-two million, three hundred thirty-one thousand, nine hundred six".