140633221 has 8 divisors (see below), whose sum is σ = 144207864. Its totient is φ = 137092800.

The previous prime is 140633191. The next prime is 140633237. The reversal of 140633221 is 122336041.

140633221 = 8385² + 8386².

It can be written as a sum of positive squares in 4 ways, for example, as 70324996 + 70308225 = 8386^2 + 8385^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 4-Lehmer number, since φ(140633221) divides (140633221-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 140633221 - 2¹³ = 140625029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140633192 and 140633201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140633281) 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 7 ways as a sum of consecutive naturals, for example, 130 + ... + 16771.

It is an arithmetic number, because the mean of its divisors is an integer number (18025983).

Almost surely, 2^140633221 is an apocalyptic number.

140633221 is the 8386-th centered square number.

It is an amenable number.

140633221 is a deficient number, since it is larger than the sum of its proper divisors (3574643).

140633221 is a wasteful number, since it uses less digits than its factorization.

140633221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17111.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 140633221 is about 11858.8878483608. The cubic root of 140633221 is about 520.0310891176.

Adding to 140633221 its reverse (122336041), we get a palindrome (262969262).

The spelling of 140633221 in words is "one hundred forty million, six hundred thirty-three thousand, two hundred twenty-one".