140073221 has 4 divisors (see below), whose sum is σ = 144591744. Its totient is φ = 135554700.

The previous prime is 140073211. The next prime is 140073229. The reversal of 140073221 is 122370041.

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, and also an emirpimes, since its reverse is a distinct semiprime: 122370041 = 2203 ⋅55547.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140073221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140073193 and 140073202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140073229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2259215 + ... + 2259276.

It is an arithmetic number, because the mean of its divisors is an integer number (36147936).

Almost surely, 2^140073221 is an apocalyptic number.

It is an amenable number.

140073221 is a deficient number, since it is larger than the sum of its proper divisors (4518523).

140073221 is an equidigital number, since it uses as much as digits as its factorization.

140073221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4518522.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 140073221 is about 11835.2533137234. The cubic root of 140073221 is about 519.3399181250.

The spelling of 140073221 in words is "one hundred forty million, seventy-three thousand, two hundred twenty-one".