320425155421 has 4 divisors (see below), whose sum is σ = 366200177632. Its totient is φ = 274650133212.

The previous prime is 320425155373. The next prime is 320425155481. The reversal of 320425155421 is 124551524023.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 320425155421 - 2¹⁹ = 320424631133 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 (320425155481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22887511095 + ... + 22887511108.

It is an arithmetic number, because the mean of its divisors is an integer number (91550044408).

Almost surely, 2^320425155421 is an apocalyptic number.

It is an amenable number.

320425155421 is a deficient number, since it is larger than the sum of its proper divisors (45775022211).

320425155421 is an equidigital number, since it uses as much as digits as its factorization.

320425155421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45775022210.

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 320425155421 its reverse (124551524023), we get a palindrome (444976679444).

The spelling of 320425155421 in words is "three hundred twenty billion, four hundred twenty-five million, one hundred fifty-five thousand, four hundred twenty-one".