255020421 has 8 divisors (see below), whose sum is σ = 340633440. Its totient is φ = 169710512.

The previous prime is 255020419. The next prime is 255020459. The reversal of 255020421 is 124020552.

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 255020421 - 2¹ = 255020419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255020221) 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, 73806 + ... + 77183.

It is an arithmetic number, because the mean of its divisors is an integer number (42579180).

Almost surely, 2^255020421 is an apocalyptic number.

It is an amenable number.

255020421 is a deficient number, since it is larger than the sum of its proper divisors (85613019).

255020421 is a wasteful number, since it uses less digits than its factorization.

255020421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151555.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 255020421 is about 15969.3588161829. The cubic root of 255020421 is about 634.1494976961.

Adding to 255020421 its reverse (124020552), we get a palindrome (379040973).

The spelling of 255020421 in words is "two hundred fifty-five million, twenty thousand, four hundred twenty-one".