142240331 has 8 divisors (see below), whose sum is σ = 147684720. Its totient is φ = 136831968.

The previous prime is 142240297. The next prime is 142240361. The reversal of 142240331 is 133042241.

142240331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 142240331 - 2²⁶ = 75131467 is a prime.

It is a super-2 number, since 2×142240331² = 40464623525979122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142240361) 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, 821 + ... + 16886.

It is an arithmetic number, because the mean of its divisors is an integer number (18460590).

Almost surely, 2^142240331 is an apocalyptic number.

142240331 is a deficient number, since it is larger than the sum of its proper divisors (5444389).

142240331 is a wasteful number, since it uses less digits than its factorization.

142240331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18013.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 142240331 is about 11926.4550894220. The cubic root of 142240331 is about 522.0045054244.

Adding to 142240331 its reverse (133042241), we get a palindrome (275282572).

The spelling of 142240331 in words is "one hundred forty-two million, two hundred forty thousand, three hundred thirty-one".