140640331 has 16 divisors (see below), whose sum is σ = 158505984. Its totient is φ = 123814944.

The previous prime is 140640329. The next prime is 140640359. The reversal of 140640331 is 133046041.

It is a cyclic number.

It is not a de Polignac number, because 140640331 - 2¹ = 140640329 is a prime.

It is a super-2 number, since 2×140640331² = 39559405407579122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (140640301) 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, 193090 + ... + 193816.

It is an arithmetic number, because the mean of its divisors is an integer number (9906624).

Almost surely, 2^140640331 is an apocalyptic number.

140640331 is a deficient number, since it is larger than the sum of its proper divisors (17865653).

140640331 is a wasteful number, since it uses less digits than its factorization.

140640331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 140640331 is about 11859.1876197318. The cubic root of 140640331 is about 520.0398527148.

Adding to 140640331 its reverse (133046041), we get a palindrome (273686372).

The spelling of 140640331 in words is "one hundred forty million, six hundred forty thousand, three hundred thirty-one".