140349231 has 18 divisors (see below), whose sum is σ = 222833520. Its totient is φ = 85059480.

The previous prime is 140349221. The next prime is 140349233. The reversal of 140349231 is 132943041.

140349231 is a `hidden beast` number, since 140 + 3 + 492 + 31 = 666.

It is not a de Polignac number, because 140349231 - 2⁵ = 140349199 is a prime.

It is a super-2 number, since 2×140349231² = 39395813284582722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 140349195 and 140349204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140349233) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 63351 + ... + 65528.

It is an arithmetic number, because the mean of its divisors is an integer number (12379640).

Almost surely, 2^140349231 is an apocalyptic number.

140349231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

140349231 is a deficient number, since it is larger than the sum of its proper divisors (82484289).

140349231 is a wasteful number, since it uses less digits than its factorization.

140349231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128907 (or 128893 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 140349231 is about 11846.9080776378. The cubic root of 140349231 is about 519.6808087956.

The spelling of 140349231 in words is "one hundred forty million, three hundred forty-nine thousand, two hundred thirty-one".