140243631 has 8 divisors (see below), whose sum is σ = 203990784. Its totient is φ = 84996120.

The previous prime is 140243603. The next prime is 140243639. The reversal of 140243631 is 136342041.

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

It is not a de Polignac number, because 140243631 - 2⁵ = 140243599 is a prime.

It is a super-2 number, since 2×140243631² = 39336552072128322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140243639) 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 7 ways as a sum of consecutive naturals, for example, 2124871 + ... + 2124936.

It is an arithmetic number, because the mean of its divisors is an integer number (25498848).

Almost surely, 2^140243631 is an apocalyptic number.

140243631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

140243631 is a deficient number, since it is larger than the sum of its proper divisors (63747153).

140243631 is a wasteful number, since it uses less digits than its factorization.

140243631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4249821.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 140243631 is about 11842.4503798834. The cubic root of 140243631 is about 519.5504386173.

Adding to 140243631 its reverse (136342041), we get a palindrome (276585672).

The spelling of 140243631 in words is "one hundred forty million, two hundred forty-three thousand, six hundred thirty-one".