140143431 has 16 divisors (see below), whose sum is σ = 190180224. Its totient is φ = 91775904.

The previous prime is 140143403. The next prime is 140143463. The reversal of 140143431 is 134341041.

140143431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 140143431 - 2¹¹ = 140141383 is a prime.

It is a super-2 number, since 2×140143431² = 39280362504903522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 140143398 and 140143407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140145431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93121 + ... + 94613.

It is an arithmetic number, because the mean of its divisors is an integer number (11886264).

Almost surely, 2^140143431 is an apocalyptic number.

140143431 is a deficient number, since it is larger than the sum of its proper divisors (50036793).

140143431 is a wasteful number, since it uses less digits than its factorization.

140143431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2030.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 140143431 is about 11838.2190805881. The cubic root of 140143431 is about 519.4266745726.

Adding to 140143431 its reverse (134341041), we get a palindrome (274484472).

The spelling of 140143431 in words is "one hundred forty million, one hundred forty-three thousand, four hundred thirty-one".