140243233 has 8 divisors (see below), whose sum is σ = 151995368. Its totient is φ = 128628864.

The previous prime is 140243227. The next prime is 140243239. The reversal of 140243233 is 332342041.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (140243227) and next prime (140243239).

It can be written as a sum of positive squares in 4 ways, for example, as 247009 + 139996224 = 497^2 + 11832^2 .

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

It is not a de Polignac number, because 140243233 - 2²⁵ = 106688801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140243239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32316 + ... + 36397.

It is an arithmetic number, because the mean of its divisors is an integer number (18999421).

Almost surely, 2^140243233 is an apocalyptic number.

140243233 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

140243233 is a deficient number, since it is larger than the sum of its proper divisors (11752135).

140243233 is a wasteful number, since it uses less digits than its factorization.

140243233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68883.

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

The square root of 140243233 is about 11842.4335759167. The cubic root of 140243233 is about 519.5499471363.

Adding to 140243233 its reverse (332342041), we get a palindrome (472585274).

The spelling of 140243233 in words is "one hundred forty million, two hundred forty-three thousand, two hundred thirty-three".