140505031 has 4 divisors (see below), whose sum is σ = 141065064. Its totient is φ = 139945000.

The previous prime is 140505007. The next prime is 140505041. The reversal of 140505031 is 130505041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 140505031 - 2⁹ = 140504519 is a prime.

It is a super-2 number, since 2×140505031² = 39483327472621922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140505041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279640 + ... + 280141.

It is an arithmetic number, because the mean of its divisors is an integer number (35266266).

Almost surely, 2^140505031 is an apocalyptic number.

140505031 is a deficient number, since it is larger than the sum of its proper divisors (560033).

140505031 is an equidigital number, since it uses as much as digits as its factorization.

140505031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560032.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 140505031 is about 11853.4818091563. The cubic root of 140505031 is about 519.8730348306.

The spelling of 140505031 in words is "one hundred forty million, five hundred five thousand, thirty-one".