140044442431 has 4 divisors (see below), whose sum is σ = 140082388264. Its totient is φ = 140006496600.

The previous prime is 140044442401. The next prime is 140044442471. The reversal of 140044442431 is 134244440041.

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 140044442431 - 2¹⁵ = 140044409663 is a prime.

It is a super-2 number, since 2×140044442431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140044442393 and 140044442402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140044442401) 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, 18967380 + ... + 18974761.

It is an arithmetic number, because the mean of its divisors is an integer number (35020597066).

Almost surely, 2^140044442431 is an apocalyptic number.

140044442431 is a deficient number, since it is larger than the sum of its proper divisors (37945833).

140044442431 is an equidigital number, since it uses as much as digits as its factorization.

140044442431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37945832.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 140044442431 its reverse (134244440041), we get a palindrome (274288882472).

The spelling of 140044442431 in words is "one hundred forty billion, forty-four million, four hundred forty-two thousand, four hundred thirty-one".