140813221 has 4 divisors (see below), whose sum is σ = 140879232. Its totient is φ = 140747212.

The previous prime is 140813213. The next prime is 140813249. The reversal of 140813221 is 122318041.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 140813221 - 2³ = 140813213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140813192 and 140813201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140813021) 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, 29695 + ... + 34108.

It is an arithmetic number, because the mean of its divisors is an integer number (35219808).

Almost surely, 2^140813221 is an apocalyptic number.

It is an amenable number.

140813221 is a deficient number, since it is larger than the sum of its proper divisors (66011).

140813221 is an equidigital number, since it uses as much as digits as its factorization.

140813221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66010.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 140813221 is about 11866.4746660497. The cubic root of 140813221 is about 520.2528614880.

The spelling of 140813221 in words is "one hundred forty million, eight hundred thirteen thousand, two hundred twenty-one".