140243215251 has 4 divisors (see below), whose sum is σ = 186990953672. Its totient is φ = 93495476832.

The previous prime is 140243215243. The next prime is 140243215261. The reversal of 140243215251 is 152512342041.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 140243215251 - 2³ = 140243215243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140243215241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23373869206 + ... + 23373869211.

It is an arithmetic number, because the mean of its divisors is an integer number (46747738418).

Almost surely, 2^140243215251 is an apocalyptic number.

140243215251 is a deficient number, since it is larger than the sum of its proper divisors (46747738421).

140243215251 is an equidigital number, since it uses as much as digits as its factorization.

140243215251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46747738420.

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 140243215251 its reverse (152512342041), we get a palindrome (292755557292).

The spelling of 140243215251 in words is "one hundred forty billion, two hundred forty-three million, two hundred fifteen thousand, two hundred fifty-one".