140221913 has 8 divisors (see below), whose sum is σ = 151162368. Its totient is φ = 129303504.

The previous prime is 140221901. The next prime is 140221951. The reversal of 140221913 is 319122041.

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

It is a cyclic number.

It is not a de Polignac number, because 140221913 - 2⁶ = 140221849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (140223913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9170 + ... + 19092.

It is an arithmetic number, because the mean of its divisors is an integer number (18895296).

Almost surely, 2^140221913 is an apocalyptic number.

140221913 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

140221913 is a deficient number, since it is larger than the sum of its proper divisors (10940455).

140221913 is a wasteful number, since it uses less digits than its factorization.

140221913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11023.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 140221913 is about 11841.5333888817. The cubic root of 140221913 is about 519.5236181981.

Adding to 140221913 its reverse (319122041), we get a palindrome (459343954).

The spelling of 140221913 in words is "one hundred forty million, two hundred twenty-one thousand, nine hundred thirteen".