344223072421 has 4 divisors (see below), whose sum is σ = 345040704844. Its totient is φ = 343405440000.

The previous prime is 344223072317. The next prime is 344223072437. The reversal of 344223072421 is 124270322443.

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

It can be written as a sum of positive squares in 2 ways, for example, as 32071795396 + 312151277025 = 179086^2 + 558705^2 .

It is a cyclic number.

It is not a de Polignac number, because 344223072421 - 2²⁵ = 344189517989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (344223072461) 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, 408815580 + ... + 408816421.

It is an arithmetic number, because the mean of its divisors is an integer number (86260176211).

Almost surely, 2^344223072421 is an apocalyptic number.

It is an amenable number.

344223072421 is a deficient number, since it is larger than the sum of its proper divisors (817632423).

344223072421 is an equidigital number, since it uses as much as digits as its factorization.

344223072421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817632422.

The product of its (nonzero) digits is 64512, while the sum is 34.

Adding to 344223072421 its reverse (124270322443), we get a palindrome (468493394864).

The spelling of 344223072421 in words is "three hundred forty-four billion, two hundred twenty-three million, seventy-two thousand, four hundred twenty-one".