42331309 has 8 divisors (see below), whose sum is σ = 44972928. Its totient is φ = 39706560.

The previous prime is 42331301. The next prime is 42331319. The reversal of 42331309 is 90313324.

It is a happy number.

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

It is not a de Polignac number, because 42331309 - 2³ = 42331301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42331301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1164 + ... + 9274.

It is an arithmetic number, because the mean of its divisors is an integer number (5621616).

Almost surely, 2^42331309 is an apocalyptic number.

It is an amenable number.

42331309 is a deficient number, since it is larger than the sum of its proper divisors (2641619).

42331309 is a wasteful number, since it uses less digits than its factorization.

42331309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8435.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 42331309 is about 6506.2515321804. The cubic root of 42331309 is about 348.5142707994.

The spelling of 42331309 in words is "forty-two million, three hundred thirty-one thousand, three hundred nine".