140223421438 has 4 divisors (see below), whose sum is σ = 210335132160. Its totient is φ = 70111710718.

The previous prime is 140223421421. The next prime is 140223421439. The reversal of 140223421438 is 834124322041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 834124322041 = 83 ⋅10049690627.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140223421439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35055855358 + ... + 35055855361.

It is an arithmetic number, because the mean of its divisors is an integer number (52583783040).

Almost surely, 2^140223421438 is an apocalyptic number.

140223421438 is a deficient number, since it is larger than the sum of its proper divisors (70111710722).

140223421438 is an equidigital number, since it uses as much as digits as its factorization.

140223421438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70111710721.

The product of its (nonzero) digits is 36864, while the sum is 34.

Adding to 140223421438 its reverse (834124322041), we get a palindrome (974347743479).

The spelling of 140223421438 in words is "one hundred forty billion, two hundred twenty-three million, four hundred twenty-one thousand, four hundred thirty-eight".