21033142255 has 8 divisors (see below), whose sum is σ = 25776787392. Its totient is φ = 16468502688.

The previous prime is 21033142219. The next prime is 21033142259. The reversal of 21033142255 is 55224133012.

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 21033142255 - 2²⁵ = 20999587823 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 (21033142259) 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, 44751132 + ... + 44751601.

It is an arithmetic number, because the mean of its divisors is an integer number (3222098424).

Almost surely, 2^21033142255 is an apocalyptic number.

21033142255 is a deficient number, since it is larger than the sum of its proper divisors (4743645137).

21033142255 is an equidigital number, since it uses as much as digits as its factorization.

21033142255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89502785.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 21033142255 its reverse (55224133012), we get a palindrome (76257275267).

The spelling of 21033142255 in words is "twenty-one billion, thirty-three million, one hundred forty-two thousand, two hundred fifty-five".