140671231 has 8 divisors (see below), whose sum is σ = 148492400. Its totient is φ = 133260984.

The previous prime is 140671217. The next prime is 140671241. The reversal of 140671231 is 132176041.

It is not a de Polignac number, because 140671231 - 2¹¹ = 140669183 is a prime.

It is a super-2 number, since 2×140671231² = 39576790462110722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140671196 and 140671205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140671241) 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, 3396 + ... + 17113.

It is an arithmetic number, because the mean of its divisors is an integer number (18561550).

Almost surely, 2^140671231 is an apocalyptic number.

140671231 is a deficient number, since it is larger than the sum of its proper divisors (7821169).

140671231 is an frugal number, since it uses more digits than its factorization.

140671231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20566 (or 20528 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 140671231 is about 11860.4903355637. The cubic root of 140671231 is about 520.0779358039.

The spelling of 140671231 in words is "one hundred forty million, six hundred seventy-one thousand, two hundred thirty-one".