140509031 has 16 divisors (see below), whose sum is σ = 159213600. Its totient is φ = 123086208.

The previous prime is 140509027. The next prime is 140509049. The reversal of 140509031 is 130905041.

It is a happy number.

It is not a de Polignac number, because 140509031 - 2² = 140509027 is a prime.

It is a super-2 number, since 2×140509031² = 39485575585117922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 140508988 and 140509006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140509021) 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, 19085 + ... + 25401.

It is an arithmetic number, because the mean of its divisors is an integer number (9950850).

Almost surely, 2^140509031 is an apocalyptic number.

140509031 is a deficient number, since it is larger than the sum of its proper divisors (18704569).

140509031 is a wasteful number, since it uses less digits than its factorization.

140509031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6418.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 140509031 is about 11853.6505347509. The cubic root of 140509031 is about 519.8779681591.

The spelling of 140509031 in words is "one hundred forty million, five hundred nine thousand, thirty-one".