140243306421 has 32 divisors (see below), whose sum is σ = 194177225088. Its totient is φ = 89963377920.

The previous prime is 140243306419. The next prime is 140243306431. The reversal of 140243306421 is 124603342041.

It is not a de Polignac number, because 140243306421 - 2¹ = 140243306419 is a prime.

It is a super-3 number, since 3×140243306421³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140243306431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4244055 + ... + 4276971.

It is an arithmetic number, because the mean of its divisors is an integer number (6068038284).

Almost surely, 2^140243306421 is an apocalyptic number.

It is an amenable number.

140243306421 is a deficient number, since it is larger than the sum of its proper divisors (53933918667).

140243306421 is a wasteful number, since it uses less digits than its factorization.

140243306421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33381.

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 140243306421 its reverse (124603342041), we get a palindrome (264846648462).

The spelling of 140243306421 in words is "one hundred forty billion, two hundred forty-three million, three hundred six thousand, four hundred twenty-one".