140430731 has 16 divisors (see below), whose sum is σ = 166795200. Its totient is φ = 115680768.

The previous prime is 140430721. The next prime is 140430737. The reversal of 140430731 is 137034041.

It is a de Polignac number, because none of the positive numbers 2^k-140430731 is a prime.

It is a super-2 number, since 2×140430731² = 39441580418388722, 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 = 140430697 and 140430706.

It is not an unprimeable number, because it can be changed into a prime (140430737) 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, 45815 + ... + 48783.

It is an arithmetic number, because the mean of its divisors is an integer number (10424700).

Almost surely, 2^140430731 is an apocalyptic number.

140430731 is a deficient number, since it is larger than the sum of its proper divisors (26364469).

140430731 is a wasteful number, since it uses less digits than its factorization.

140430731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3238.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 140430731 is about 11850.3472944889. The cubic root of 140430731 is about 519.7813812273.

Adding to 140430731 its reverse (137034041), we get a palindrome (277464772).

The spelling of 140430731 in words is "one hundred forty million, four hundred thirty thousand, seven hundred thirty-one".