140152531 has 4 divisors (see below), whose sum is σ = 147529000. Its totient is φ = 132776064.

The previous prime is 140152499. The next prime is 140152583. The reversal of 140152531 is 135251041.

It is a happy number.

140152531 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 140152531 - 2⁵ = 140152499 is a prime.

It is a super-2 number, since 2×140152531² = 39285463891411922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140152591) 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, 3688206 + ... + 3688243.

It is an arithmetic number, because the mean of its divisors is an integer number (36882250).

Almost surely, 2^140152531 is an apocalyptic number.

140152531 is a deficient number, since it is larger than the sum of its proper divisors (7376469).

140152531 is an equidigital number, since it uses as much as digits as its factorization.

140152531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7376468.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 140152531 is about 11838.6034227015. The cubic root of 140152531 is about 519.4379170556.

The spelling of 140152531 in words is "one hundred forty million, one hundred fifty-two thousand, five hundred thirty-one".