140312221 has 8 divisors (see below), whose sum is σ = 160574720. Its totient is φ = 120104208.

The previous prime is 140312219. The next prime is 140312281. The reversal of 140312221 is 122213041.

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

It is not a de Polignac number, because 140312221 - 2¹ = 140312219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140312195 and 140312204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140312281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7941 + ... + 18538.

It is an arithmetic number, because the mean of its divisors is an integer number (20071840).

Almost surely, 2^140312221 is an apocalyptic number.

It is an amenable number.

140312221 is a deficient number, since it is larger than the sum of its proper divisors (20262499).

140312221 is an equidigital number, since it uses as much as digits as its factorization.

140312221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27243.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 140312221 is about 11845.3459637108. The cubic root of 140312221 is about 519.6351249505.

Adding to 140312221 its reverse (122213041), we get a palindrome (262525262).

The spelling of 140312221 in words is "one hundred forty million, three hundred twelve thousand, two hundred twenty-one".