140143221 has 24 divisors (see below), whose sum is σ = 213564000. Its totient is φ = 88312032.

The previous prime is 140143193. The next prime is 140143229. The reversal of 140143221 is 122341041.

140143221 is a `hidden beast` number, since 1 + 401 + 43 + 221 = 666.

140143221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 140143221 - 2¹⁷ = 140012149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 140143194 and 140143203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140143229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125815 + ... + 126923.

It is an arithmetic number, because the mean of its divisors is an integer number (8898500).

Almost surely, 2^140143221 is an apocalyptic number.

It is an amenable number.

140143221 is a deficient number, since it is larger than the sum of its proper divisors (73420779).

140143221 is a wasteful number, since it uses less digits than its factorization.

140143221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1873 (or 1870 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 140143221 is about 11838.2102110074. The cubic root of 140143221 is about 519.4264151249.

Adding to 140143221 its reverse (122341041), we get a palindrome (262484262).

The spelling of 140143221 in words is "one hundred forty million, one hundred forty-three thousand, two hundred twenty-one".