140442331 has 8 divisors (see below), whose sum is σ = 147333600. Its totient is φ = 133687680.

The previous prime is 140442299. The next prime is 140442359. The reversal of 140442331 is 133244041.

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

It is not a de Polignac number, because 140442331 - 2⁵ = 140442299 is a prime.

It is a super-2 number, since 2×140442331² = 39448096673427122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140442371) 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, 32046 + ... + 36163.

It is an arithmetic number, because the mean of its divisors is an integer number (18416700).

Almost surely, 2^140442331 is an apocalyptic number.

140442331 is a deficient number, since it is larger than the sum of its proper divisors (6891269).

140442331 is an equidigital number, since it uses as much as digits as its factorization.

140442331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68309.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 140442331 is about 11850.8367215146. The cubic root of 140442331 is about 519.7956926674.

Adding to 140442331 its reverse (133244041), we get a palindrome (273686372).

The spelling of 140442331 in words is "one hundred forty million, four hundred forty-two thousand, three hundred thirty-one".