140331537 has 12 divisors (see below), whose sum is σ = 206024884. Its totient is φ = 92020320.

The previous prime is 140331517. The next prime is 140331539. The reversal of 140331537 is 735133041.

It can be written as a sum of positive squares in 2 ways, for example, as 1185921 + 139145616 = 1089^2 + 11796^2 .

It is not a de Polignac number, because 140331537 - 2⁷ = 140331409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140331537.

It is not an unprimeable number, because it can be changed into a prime (140331539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127258 + ... + 128355.

Almost surely, 2^140331537 is an apocalyptic number.

It is an amenable number.

140331537 is a deficient number, since it is larger than the sum of its proper divisors (65693347).

140331537 is a wasteful number, since it uses less digits than its factorization.

140331537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255680 (or 255677 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 140331537 is about 11846.1612769707. The cubic root of 140331537 is about 519.6589689451.

Adding to 140331537 its reverse (735133041), we get a palindrome (875464578).

The spelling of 140331537 in words is "one hundred forty million, three hundred thirty-one thousand, five hundred thirty-seven".