140251031 has 4 divisors (see below), whose sum is σ = 142172352. Its totient is φ = 138329712.

The previous prime is 140251009. The next prime is 140251073. The reversal of 140251031 is 130152041.

140251031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 140251031 - 2¹⁰ = 140250007 is a prime.

It is a super-2 number, since 2×140251031² = 39340703393125922, 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 (140251081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 960551 + ... + 960696.

It is an arithmetic number, because the mean of its divisors is an integer number (35543088).

Almost surely, 2^140251031 is an apocalyptic number.

140251031 is a deficient number, since it is larger than the sum of its proper divisors (1921321).

140251031 is an equidigital number, since it uses as much as digits as its factorization.

140251031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1921320.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 140251031 is about 11842.7628111011. The cubic root of 140251031 is about 519.5595765382.

The spelling of 140251031 in words is "one hundred forty million, two hundred fifty-one thousand, thirty-one".