255443023421 has 8 divisors (see below), whose sum is σ = 256148559744. Its totient is φ = 254737828800.

The previous prime is 255443023391. The next prime is 255443023441. The reversal of 255443023421 is 124320344552.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 255443023421 - 2²² = 255438829117 is a prime.

It is a super-2 number, since 2×255443023421² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255443023441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1449710 + ... + 1616336.

It is an arithmetic number, because the mean of its divisors is an integer number (32018569968).

Almost surely, 2^255443023421 is an apocalyptic number.

It is an amenable number.

255443023421 is a deficient number, since it is larger than the sum of its proper divisors (705536323).

255443023421 is a wasteful number, since it uses less digits than its factorization.

255443023421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170851.

The product of its (nonzero) digits is 115200, while the sum is 35.

Adding to 255443023421 its reverse (124320344552), we get a palindrome (379763367973).

The spelling of 255443023421 in words is "two hundred fifty-five billion, four hundred forty-three million, twenty-three thousand, four hundred twenty-one".