140420251051 has 4 divisors (see below), whose sum is σ = 147810790600. Its totient is φ = 133029711504.

The previous prime is 140420251031. The next prime is 140420251063. The reversal of 140420251051 is 150152024041.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140420251051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140420251031) 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, 3695269746 + ... + 3695269783.

It is an arithmetic number, because the mean of its divisors is an integer number (36952697650).

Almost surely, 2^140420251051 is an apocalyptic number.

140420251051 is a deficient number, since it is larger than the sum of its proper divisors (7390539549).

140420251051 is an equidigital number, since it uses as much as digits as its factorization.

140420251051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7390539548.

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 140420251051 its reverse (150152024041), we get a palindrome (290572275092).

The spelling of 140420251051 in words is "one hundred forty billion, four hundred twenty million, two hundred fifty-one thousand, fifty-one".