10021255 has 4 divisors (see below), whose sum is σ = 12025512. Its totient is φ = 8017000.

The previous prime is 10021247. The next prime is 10021259. The reversal of 10021255 is 55212001.

10021255 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 10021255 - 2³ = 10021247 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 (10021259) 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, 1002121 + ... + 1002130.

It is an arithmetic number, because the mean of its divisors is an integer number (3006378).

Almost surely, 2^10021255 is an apocalyptic number.

10021255 is a deficient number, since it is larger than the sum of its proper divisors (2004257).

10021255 is an equidigital number, since it uses as much as digits as its factorization.

10021255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2004256.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 10021255 is about 3165.6365868495. The cubic root of 10021255 is about 215.5960026819.

Adding to 10021255 its reverse (55212001), we get a palindrome (65233256).

The spelling of 10021255 in words is "ten million, twenty-one thousand, two hundred fifty-five".