140813531 has 8 divisors (see below), whose sum is σ = 145825680. Its totient is φ = 135811872.

The previous prime is 140813483. The next prime is 140813537. The reversal of 140813531 is 135318041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 140813531 - 2⁶ = 140813467 is a prime.

It is a super-2 number, since 2×140813531² = 39656901025375922, which contains 22 as substring.

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 140813531.

It is not an unprimeable number, because it can be changed into a prime (140813537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33176 + ... + 37178.

It is an arithmetic number, because the mean of its divisors is an integer number (18228210).

Almost surely, 2^140813531 is an apocalyptic number.

140813531 is a deficient number, since it is larger than the sum of its proper divisors (5012149).

140813531 is a wasteful number, since it uses less digits than its factorization.

140813531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5245.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 140813531 is about 11866.4877280516. The cubic root of 140813531 is about 520.2532432663.

The spelling of 140813531 in words is "one hundred forty million, eight hundred thirteen thousand, five hundred thirty-one".