140215943 has 4 divisors (see below), whose sum is σ = 160246800. Its totient is φ = 120185088.

The previous prime is 140215939. The next prime is 140215951. The reversal of 140215943 is 349512041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 349512041 = 43 ⋅8128187.

It is a cyclic number.

It is not a de Polignac number, because 140215943 - 2² = 140215939 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140215963) 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 3 ways as a sum of consecutive naturals, for example, 10015418 + ... + 10015431.

It is an arithmetic number, because the mean of its divisors is an integer number (40061700).

Almost surely, 2^140215943 is an apocalyptic number.

140215943 is a deficient number, since it is larger than the sum of its proper divisors (20030857).

140215943 is an equidigital number, since it uses as much as digits as its factorization.

140215943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20030856.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 140215943 is about 11841.2813073586. The cubic root of 140215943 is about 519.5162451232.

Adding to 140215943 its reverse (349512041), we get a palindrome (489727984).

The spelling of 140215943 in words is "one hundred forty million, two hundred fifteen thousand, nine hundred forty-three".