140386231 has 4 divisors (see below), whose sum is σ = 147775000. Its totient is φ = 132997464.

The previous prime is 140386217. The next prime is 140386237. The reversal of 140386231 is 132683041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 140386231 - 2⁹ = 140385719 is a prime.

It is a super-2 number, since 2×140386231² = 39416587708770722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140386231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140386237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3694356 + ... + 3694393.

It is an arithmetic number, because the mean of its divisors is an integer number (36943750).

Almost surely, 2^140386231 is an apocalyptic number.

140386231 is a deficient number, since it is larger than the sum of its proper divisors (7388769).

140386231 is an equidigital number, since it uses as much as digits as its factorization.

140386231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7388768.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 140386231 is about 11848.4695636188. The cubic root of 140386231 is about 519.7264722698.

The spelling of 140386231 in words is "one hundred forty million, three hundred eighty-six thousand, two hundred thirty-one".