140240221 has 4 divisors (see below), whose sum is σ = 152989344. Its totient is φ = 127491100.

The previous prime is 140240161. The next prime is 140240267. The reversal of 140240221 is 122042041.

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 140240221 - 2¹¹ = 140238173 is a prime.

It is a super-2 number, since 2×140240221² = 39334639172257682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140240195 and 140240204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140240921) 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, 6374545 + ... + 6374566.

It is an arithmetic number, because the mean of its divisors is an integer number (38247336).

Almost surely, 2^140240221 is an apocalyptic number.

140240221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

140240221 is a deficient number, since it is larger than the sum of its proper divisors (12749123).

140240221 is a wasteful number, since it uses less digits than its factorization.

140240221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12749122.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 140240221 is about 11842.3064054263. The cubic root of 140240221 is about 519.5462276564.

Adding to 140240221 its reverse (122042041), we get a palindrome (262282262).

The spelling of 140240221 in words is "one hundred forty million, two hundred forty thousand, two hundred twenty-one".