140537231 has 4 divisors (see below), whose sum is σ = 140578200. Its totient is φ = 140496264.

The previous prime is 140537207. The next prime is 140537251. The reversal of 140537231 is 132735041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132735041 = 229 ⋅579629.

It is a cyclic number.

It is not a de Polignac number, because 140537231 - 2¹⁴ = 140520847 is a prime.

It is a super-2 number, since 2×140537231² = 39501426594294722, 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 140537231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140537251) 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 3 ways as a sum of consecutive naturals, for example, 14816 + ... + 22373.

It is an arithmetic number, because the mean of its divisors is an integer number (35144550).

Almost surely, 2^140537231 is an apocalyptic number.

140537231 is a deficient number, since it is larger than the sum of its proper divisors (40969).

140537231 is an equidigital number, since it uses as much as digits as its factorization.

140537231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40968.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 140537231 is about 11854.8399820495. The cubic root of 140537231 is about 519.9127454682.

The spelling of 140537231 in words is "one hundred forty million, five hundred thirty-seven thousand, two hundred thirty-one".