255350021 has 8 divisors (see below), whose sum is σ = 257647104. Its totient is φ = 253063440.

The previous prime is 255349999. The next prime is 255350077. The reversal of 255350021 is 120053552.

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 255350021 - 2²² = 251155717 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 (255350521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50996 + ... + 55778.

It is an arithmetic number, because the mean of its divisors is an integer number (32205888).

Almost surely, 2^255350021 is an apocalyptic number.

It is an amenable number.

255350021 is a deficient number, since it is larger than the sum of its proper divisors (2297083).

255350021 is a wasteful number, since it uses less digits than its factorization.

255350021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5251.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 255350021 is about 15979.6752470130. The cubic root of 255350021 is about 634.4225813065.

The spelling of 255350021 in words is "two hundred fifty-five million, three hundred fifty thousand, twenty-one".