255022421 has 4 divisors (see below), whose sum is σ = 255992352. Its totient is φ = 254052492.

The previous prime is 255022403. The next prime is 255022441. The reversal of 255022421 is 124220552.

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 a cyclic number.

It is not a de Polignac number, because 255022421 - 2⁶ = 255022357 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 (255022441) 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, 484571 + ... + 485096.

It is an arithmetic number, because the mean of its divisors is an integer number (63998088).

Almost surely, 2^255022421 is an apocalyptic number.

It is an amenable number.

255022421 is a deficient number, since it is larger than the sum of its proper divisors (969931).

255022421 is an equidigital number, since it uses as much as digits as its factorization.

255022421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969930.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 255022421 is about 15969.4214359820. The cubic root of 255022421 is about 634.1511554662.

Adding to 255022421 its reverse (124220552), we get a palindrome (379242973).

The spelling of 255022421 in words is "two hundred fifty-five million, twenty-two thousand, four hundred twenty-one".