140442213 has 4 divisors (see below), whose sum is σ = 187256288. Its totient is φ = 93628140.

The previous prime is 140442149. The next prime is 140442221. The reversal of 140442213 is 312244041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 140442213 - 2⁶ = 140442149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140442213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140442223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23407033 + ... + 23407038.

It is an arithmetic number, because the mean of its divisors is an integer number (46814072).

Almost surely, 2^140442213 is an apocalyptic number.

It is an amenable number.

140442213 is a deficient number, since it is larger than the sum of its proper divisors (46814075).

140442213 is an equidigital number, since it uses as much as digits as its factorization.

140442213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46814074.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 140442213 is about 11850.8317429622. The cubic root of 140442213 is about 519.7955470895.

Adding to 140442213 its reverse (312244041), we get a palindrome (452686254).

The spelling of 140442213 in words is "one hundred forty million, four hundred forty-two thousand, two hundred thirteen".