42432331 has 4 divisors (see below), whose sum is σ = 42485464. Its totient is φ = 42379200.

The previous prime is 42432319. The next prime is 42432337. The reversal of 42432331 is 13323424.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 42432331 - 2⁹ = 42431819 is a prime.

It is a super-2 number, since 2×42432331² = 3601005428187122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42432337) 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, 25350 + ... + 26971.

It is an arithmetic number, because the mean of its divisors is an integer number (10621366).

Almost surely, 2^42432331 is an apocalyptic number.

42432331 is a deficient number, since it is larger than the sum of its proper divisors (53133).

42432331 is an equidigital number, since it uses as much as digits as its factorization.

42432331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53132.

The product of its digits is 1728, while the sum is 22.

The square root of 42432331 is about 6514.0103622883. The cubic root of 42432331 is about 348.7912890740.

Adding to 42432331 its reverse (13323424), we get a palindrome (55755755).

The spelling of 42432331 in words is "forty-two million, four hundred thirty-two thousand, three hundred thirty-one".