255050304420021 has 32 divisors (see below), whose sum is σ = 383805343163520. Its totient is φ = 149233840896000.

The previous prime is 255050304419971. The next prime is 255050304420029. The reversal of 255050304420021 is 120024403050552.

It is a happy number.

It is not a de Polignac number, because 255050304420021 - 2¹³ = 255050304411829 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255050304420029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1397821 + ... + 22628621.

It is an arithmetic number, because the mean of its divisors is an integer number (11993916973860).

Almost surely, 2^{255050304420021} is an apocalyptic number.

It is an amenable number.

255050304420021 is a deficient number, since it is larger than the sum of its proper divisors (128755038743499).

255050304420021 is a wasteful number, since it uses less digits than its factorization.

255050304420021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21243397.

The product of its (nonzero) digits is 48000, while the sum is 33.

Adding to 255050304420021 its reverse (120024403050552), we get a palindrome (375074707470573).

The spelling of 255050304420021 in words is "two hundred fifty-five trillion, fifty billion, three hundred four million, four hundred twenty thousand, twenty-one".